Notes: drumroll and balloon tails start at their first column

An empty column at the joint was filtered into a thin dark line on the drumroll body. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Notes: arcade note and label sprites
2026-11-07 20:14:41 +08:00 · 2026-11-07 01:01:15 +08:00 · 2026-11-06 17:52:46 +01:00 · 2026-11-07 00:46:12 +08:00 · 2026-11-04 19:53:47 -05:00 · 2026-11-03 03:44:32 +08:00
40 changed files with 454 additions and 267 deletions
@@ -0,0 +1,10 @@
+{
+    "pat": {},
+    "mtn": {},
+    "cloud": {},
+    "w13": {},
+    "w16": {},
+    "w21": {},
+    "w24": {},
+    "floor": {}
+}
@@ -1084,108 +1084,85 @@
 {
  "id": 68,
  "type": "texture_change",
-  "duration": 266.72,
+  "duration": 250,
  "textures": [
   [
-    0.0,
-    33.34,
+    0,
+    40,
    0
   ],
   [
-    33.34,
-    66.68,
+    40,
+    60,
    1
   ],
   [
-    66.68,
-    100.02,
+    60,
+    80,
    2
   ],
   [
-    100.02,
-    133.36,
+    80,
+    100,
    3
-   ],
-   [
-    133.36,
-    166.7,
-    4
-   ],
-   [
-    166.7,
-    200.04,
-    5
-   ],
-   [
-    200.04,
-    233.38,
-    6
-   ],
-   [
-    233.38,
-    266.72,
-    7
   ]
  ],
-  "loop": true,
-  "comment": "gogo fire flipbook (arcade lane_hit MC37 = 2 engine frames per cel = 266.72 ms; id 25 stays the tamashii fire pace)"
+  "comment": "big judgment outer texture change"
+ },
+ {
+  "id": 69,
+  "type": "fade",
+  "duration": 100,
+  "initial_opacity": 1.0,
+  "final_opacity": 0.0,
+  "delay": 150,
+  "comment": "big judgment outer fade"
 },
 {
  "id": 70,
-  "type": "fade",
-  "duration": 450,
-  "initial_opacity": 0.0,
-  "final_opacity": 1.0,
-  "comment": "r57: result-gauge fade-in (replaces the id-17 renda-MOVE collision; see gauge.cpp make_result)"
+  "type": "texture_resize",
+  "duration": 50,
+  "initial_size": 0.4,
+  "final_size": 1.0,
+  "comment": "big judgment outer scale in"
 },
 {
  "id": 71,
-  "type": "texture_change",
-  "duration": 400,
-  "textures": [
-   [
-    0.0,
-    49.989999999999995,
-    0
-   ],
-   [
-    49.989999999999995,
-    99.97999999999999,
-    1
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-    6
-   ],
-   [
-    349.92999999999995,
-    399.91999999999996,
-    7
-   ]
-  ],
-  "loop": true,
-  "comment": "r57: result-gauge tamashii fire cels (replaces the id-20 kusudama-FADE collision; body = id 25, the real 8-cel 400 ms fire cycle)"
+  "type": "texture_resize",
+  "duration": 116.7,
+  "initial_size": 0.575,
+  "final_size": 1.0,
+  "ease_out": "quadratic",
+  "comment": "big ray ring scale"
+ },
+ {
+  "id": 72,
+  "type": "fade",
+  "duration": 50,
+  "initial_opacity": 1.0,
+  "final_opacity": 0.0,
+  "delay": 66.7,
+  "comment": "big ray ring fade"
+ },
+ {
+  "id": 73,
+  "type": "texture_resize",
+  "duration": 200,
+  "initial_size": 0.247,
+  "final_size": 0.856,
+  "delay": 100,
+  "ease_out": "quadratic",
+  "comment": "big good second ray ring scale"
+ },
+ {
+  "id": 74,
+  "type": "fade",
+  "duration": 100,
+  "initial_opacity": 0.0,
+  "final_opacity": 1.0,
+  "delay": 100,
+  "reverse_delay": 0,
+  "comment": "big good second ray ring fade in/out"
 },
 {
  "id": 76,
@@ -1,8 +1,8 @@
 {
  "explosion": [
    {
-      "x": -46,
-      "y": 336,
+      "x": 150,
+      "y": 993,
      "crop": [
        [
          0,
@@ -187,24 +187,24 @@
      ]
    },
    {
-      "x": 276,
-      "y": 333
+      "x": 472,
+      "y": 990
    },
    {
-      "x": 599,
-      "y": 333
+      "x": 795,
+      "y": 990
    },
    {
-      "x": 921,
-      "y": 333
+      "x": 1117,
+      "y": 990
    },
    {
-      "x": 1244,
-      "y": 333
+      "x": 1440,
+      "y": 990
    },
    {
-      "x": 1566,
-      "y": 336
+      "x": 1762,
+      "y": 993
    }
  ],
  "fire": {
@@ -228,5 +228,13 @@
        256
      ]
    ]
+  },
+  "outer_effect_good": {
+    "x": 450,
+    "y": -58
+  },
+  "outer_effect_ok": {
+    "x": 450,
+    "y": -58
  }
 }
@@ -31,7 +31,7 @@
        "text": {
            "ja": "フチを5回叩くと説明がおわるよ",
            "en": "Hit the rim 5 times to skip",
-            "zh": "敲击鼓边5次即可跳过说明",
+            "zh": "敲击5次鼓边即可结束说明",
            "ko": "테두리를 5번 치면 설명이 끝나"
        }
    },
@@ -40,15 +40,109 @@
        "text": {
            "ja": "ココをこえれば\nクリア",
            "en": "Get past here\nto clear",
-            "zh": "超过这里\n就能通关",
+            "zh": "超过这个位置\n就算通关了！",
            "ko": "여기를 넘으면\n클리어"
        }
    },
+    "tutorial_caption_1": {
+        "font_size": 38,
+        "text": {
+            "ja": "このゲームのあそびかたをおしえるよ",
+            "en": "This is how to play!",
+            "zh": "现在开始讲解游戏的玩法",
+            "ko": "이 게임의 플레이 방법을 알려줄게"
+        }
+    },
+    "tutorial_caption_2": {
+        "font_size": 38,
+        "text": {
+            "ja": "流れてくる音符が\nワクにかさなったら\nバチで太鼓をたたこう",
+            "en": "When a note flows in\nand reaches the frame,\nhit the drum with your sticks!",
+            "zh": "注意画面\n当音符移动至与敲击框重合\n便敲击太鼓吧！",
+            "ko": "흘러오는 음표가\n틀에 겹쳐지면\n북채로 북을 치자"
+        }
+    },
+    "tutorial_caption_3": {
+        "font_size": 38,
+        "text": {
+            "ja": "太鼓のどうの部分は\nキケンだからたたかないでね",
+            "en": "Don't hit the side of the drum,\nit's dangerous!",
+            "zh": "为避免危险\n请不要敲击鼓身",
+            "ko": "북의 몸통 부분은\n위험하니까 치지 마"
+        }
+    },
+    "tutorial_caption_4": {
+        "font_size": 38,
+        "text": {
+            "ja": "赤い音符{don}は面をたたこう",
+            "en": "Red notes {don} : hit the face!",
+            "zh": "{don} 敲打鼓面吧",
+            "ko": "빨간 음표{don}는 면을 치자"
+        }
+    },
+    "tutorial_caption_5": {
+        "font_size": 38,
+        "text": {
+            "ja": "青い音符{kat}はフチをたたこう",
+            "en": "Blue notes {kat} : hit the rim!",
+            "zh": "{kat} 敲打鼓边吧",
+            "ko": "파란 음표{kat}는 테를 치자"
+        }
+    },
+    "tutorial_caption_6": {
+        "font_size": 38,
+        "text": {
+            "ja": "大きな音符{big_don}{big_kat}は\n強くたたくと高得点！",
+            "en": "Big notes {big_don}{big_kat}\nscore more when hit hard!",
+            "zh": "{big_don}{big_kat} 用双手用力敲打！",
+            "ko": "큰 음표{big_don}{big_kat}는\n세게 치면 고득점!"
+        }
+    },
+    "tutorial_caption_7": {
+        "font_size": 38,
+        "text": {
+            "ja": "黄色い音符{roll}は\nひたすら連打！",
+            "en": "Yellow notes {roll}\nhit them as fast as you can!",
+            "zh": "{roll} 不停连续敲打！",
+            "ko": "노란 음표{roll}는\n계속 연타!"
+        }
+    },
+    "tutorial_caption_8": {
+        "font_size": 38,
+        "text": {
+            "ja": "ふうせん音符{balloon}と\nくすだま音符{kusudama}もとにかく連打ー！",
+            "en": "Balloon notes {balloon} and\nkusudama notes {kusudama}: keep drumming!",
+            "zh": "{balloon}{kusudama} 总之连续敲打吧！",
+            "ko": "풍선 음표{balloon}와\n쿠스다마 음표{kusudama}도 무조건 연타!"
+        }
+    },
+    "tutorial_caption_9": {
+        "font_size": 38,
+        "text": {
+            "ja": "タイミングよくたたけば\n魂（たましい）ゲージがアップ！",
+            "en": "Hit with good timing\nto fill the soul gauge!",
+            "zh": "时机把握得好，\n就能积累魂槽哦！",
+            "ko": "타이밍 좋게 치면\n혼 게이지가 올라가!"
+        }
+    },
+    "tutorial_caption_10": {
+        "font_size": 38,
+        "text": {
+            "ja": "うまくたたいてクリアをめざそう！",
+            "en": "Play well and aim for a clear!",
+            "zh": "尽情击打，争取过关吧！",
+            "ko": "잘 쳐서 클리어를 노리자!"
+        }
+    },
    "screen": {
        "parent": "PyTaikoGreen",
        "width": 1920,
        "height": 1080,
        "options": {
+            "disable_campaigns": true,
+            "disable_reward_shop": true,
+            "disable_total_result": true,
+            "disable_waiwai": true,
            "disable_retry_game": true,
            "horizontal_song_select": true,
            "one_menu_sort": true,
@@ -523,6 +617,9 @@
    "game_gogo_fire_anim": {
        "x": 68
    },
+    "game_gogo_explosion_tilt": {
+        "x": 5.8875
+    },
    "game_gogo_explosion_slots": {
        "x": 6,
        "y": 4
@@ -67,85 +67,49 @@ end
 function DaiAnim:draw() self.anim:draw(1.0) end
 function DaiAnim:destroy() self.anim:destroy() end

-local PracticeBackground  = require("background/bg_collabs/practice")
-local TutorialBackground  = require("background/bg_collabs/tutorial")
-local A3Background        = require("background/bg_collabs/a3")
-local AnimalBackground    = require("background/bg_collabs/animal")
-local ButtoBackground     = require("background/bg_collabs/buttoburst")
-local DanBackground       = require("background/bg_collabs/dan")
-local FunassyiBackground  = require("background/bg_collabs/funassyi")
-local ImasBackground      = require("background/bg_collabs/imas")
-local ImasSidemBackground = require("background/bg_collabs/imas_sidem")
-local OshiriBackground    = require("background/bg_collabs/oshiri")
-- the collabs PyTaikoGreen added after this file was forked (2026-09-07/09): Green's modules
-local DQ10Background      = require("background/bg_collabs/dq10")
-local GbBackground    = require("background/bg_collabs/gb")
-local GmtBackground   = require("background/bg_collabs/gmt")
-local GumiBackground  = require("background/bg_collabs/gumi")
-local I7id7Background = require("background/bg_collabs/i7id7")
-local I7natsuBackground = require("background/bg_collabs/i7natsu")
-local I7revBackground = require("background/bg_collabs/i7rev")
-local I7triBackground = require("background/bg_collabs/i7tri")
-local IaBackground    = require("background/bg_collabs/ia")
-local KobayashiBackground = require("background/bg_collabs/kobayashi")
-local KumamonBackground = require("background/bg_collabs/kumamon")
-local LoveliveBackground = require("background/bg_collabs/lovelive")
-local MarioBackground = require("background/bg_collabs/mario")
-local Mh3GBackground  = require("background/bg_collabs/mh3G")
-local Mh3rdBackground = require("background/bg_collabs/mh3rd")
-local MikuBackground  = require("background/bg_collabs/miku")
-local MomocloBackground = require("background/bg_collabs/momoclo")
-local PzdBackground   = require("background/bg_collabs/pzd")
-local TohoBackground  = require("background/bg_collabs/toho")
-local TonkatsudjBackground = require("background/bg_collabs/tonkatsudj")
-local ToukenBackground = require("background/bg_collabs/touken")
-local YmckBackground  = require("background/bg_collabs/ymck")
-local YokaiBackground = require("background/bg_collabs/yokai")
-local YokaiHatsukoiBackground = require("background/bg_collabs/yokai_hatsukoi")
-local YokaiMatsuriBackground = require("background/bg_collabs/yokai_matsuri")
-local YokaiTokorotenBackground = require("background/bg_collabs/yokai_tokoroten")
-local YokaiYougotaBackground = require("background/bg_collabs/yokai_yougota")

+-- a collab's script by its module, required the first time a song uses it (requiring all 37 when
+-- background.lua loaded took 250-300 ms of the first game load)
 local COLLABS             = {
-    PRACTICE   = { PracticeBackground.new, nil, 1 },
-    TUTORIAL   = { TutorialBackground.new, nil, 1 },
-    A3         = { A3Background.new, "background/collab/a3", 4 },
-    ANIMAL     = { AnimalBackground.new, "background/collab/animal", 5 },
-    BUTTOBURST = { ButtoBackground.new, "background/collab/buttoburst", 4 },
-    DAN        = { DanBackground.new, "background/collab/dan", 1 },
-    FUNASSYI   = { FunassyiBackground.new, "background/collab/funassyi", 5 },
-    IMAS       = { ImasBackground.new, "background/collab/imas", 5 },
-    IMAS_CG    = { ImasBackground.new, "background/collab/imas_cg", 3 },
-    IMAS_ML    = { ImasBackground.new, "background/collab/imas_ml", 3 },
-    IMAS_SIDEM = { ImasSidemBackground.new, "background/collab/imas_sidem", 3 },
-    OSHIRI     = { OshiriBackground.new, "background/collab/oshiri", 5 },
-    DQ10       = { DQ10Background.new, "background/collab/dq10", 5 },
-    GB    = { GbBackground.new, "background/collab/gb", 5 },
-    GMT   = { GmtBackground.new, "background/collab/gmt", 5 },
-    GUMI  = { GumiBackground.new, "background/collab/gumi", 5 },
-    I7ID7 = { I7id7Background.new, "background/collab/i7id7", 5 },
-    I7NATSU = { I7natsuBackground.new, "background/collab/i7natsu", 5 },
-    I7REV = { I7revBackground.new, "background/collab/i7rev", 5 },
-    I7TRI = { I7triBackground.new, "background/collab/i7tri", 5 },
-    IA    = { IaBackground.new, "background/collab/ia", 5 },
-    KOBAYASHI = { KobayashiBackground.new, "background/collab/kobayashi", 5 },
-    KUMAMON = { KumamonBackground.new, "background/collab/kumamon", 5 },
-    LOVELIVE = { LoveliveBackground.new, "background/collab/lovelive", 5 },
-    MARIO = { MarioBackground.new, "background/collab/mario", 5 },
-    MH3G  = { Mh3GBackground.new, "background/collab/mh3G", 5 },
-    MH3RD = { Mh3rdBackground.new, "background/collab/mh3rd", 5 },
-    MIKU  = { MikuBackground.new, "background/collab/miku", 5 },
-    MOMOCLO = { MomocloBackground.new, "background/collab/momoclo", 5 },
-    PZD   = { PzdBackground.new, "background/collab/pzd", 5 },
-    TOHO  = { TohoBackground.new, "background/collab/toho", 5 },
-    TONKATSUDJ = { TonkatsudjBackground.new, "background/collab/tonkatsudj", 1 },
-    TOUKEN = { ToukenBackground.new, "background/collab/touken", 5 },
-    YMCK  = { YmckBackground.new, "background/collab/ymck", 5 },
-    YOKAI = { YokaiBackground.new, "background/collab/yokai", 5 },
-    YOKAI_HATSUKOI = { YokaiHatsukoiBackground.new, "background/collab/yokai_hatsukoi", 5 },
-    YOKAI_MATSURI = { YokaiMatsuriBackground.new, "background/collab/yokai_matsuri", 5 },
-    YOKAI_TOKOROTEN = { YokaiTokorotenBackground.new, "background/collab/yokai_tokoroten", 5 },
-    YOKAI_YOUGOTA = { YokaiYougotaBackground.new, "background/collab/yokai_yougota", 5 },
+    PRACTICE   = { "background/bg_collabs/practice", nil, 1 },
+    TUTORIAL   = { "background/bg_collabs/tutorial", nil, 1 },
+    A3         = { "background/bg_collabs/a3", "background/collab/a3", 4 },
+    ANIMAL     = { "background/bg_collabs/animal", "background/collab/animal", 5 },
+    BUTTOBURST = { "background/bg_collabs/buttoburst", "background/collab/buttoburst", 4 },
+    DAN        = { "background/bg_collabs/dan", "background/collab/dan", 1 },
+    FUNASSYI   = { "background/bg_collabs/funassyi", "background/collab/funassyi", 5 },
+    IMAS       = { "background/bg_collabs/imas", "background/collab/imas", 5 },
+    IMAS_CG    = { "background/bg_collabs/imas", "background/collab/imas_cg", 3 },
+    IMAS_ML    = { "background/bg_collabs/imas", "background/collab/imas_ml", 3 },
+    IMAS_SIDEM = { "background/bg_collabs/imas_sidem", "background/collab/imas_sidem", 3 },
+    OSHIRI     = { "background/bg_collabs/oshiri", "background/collab/oshiri", 5 },
+    DQ10       = { "background/bg_collabs/dq10", "background/collab/dq10", 5 },
+    GB    = { "background/bg_collabs/gb", "background/collab/gb", 5 },
+    GMT   = { "background/bg_collabs/gmt", "background/collab/gmt", 5 },
+    GUMI  = { "background/bg_collabs/gumi", "background/collab/gumi", 5 },
+    I7ID7 = { "background/bg_collabs/i7id7", "background/collab/i7id7", 5 },
+    I7NATSU = { "background/bg_collabs/i7natsu", "background/collab/i7natsu", 5 },
+    I7REV = { "background/bg_collabs/i7rev", "background/collab/i7rev", 5 },
+    I7TRI = { "background/bg_collabs/i7tri", "background/collab/i7tri", 5 },
+    IA    = { "background/bg_collabs/ia", "background/collab/ia", 5 },
+    KOBAYASHI = { "background/bg_collabs/kobayashi", "background/collab/kobayashi", 5 },
+    KUMAMON = { "background/bg_collabs/kumamon", "background/collab/kumamon", 5 },
+    LOVELIVE = { "background/bg_collabs/lovelive", "background/collab/lovelive", 5 },
+    MARIO = { "background/bg_collabs/mario", "background/collab/mario", 5 },
+    MH3G  = { "background/bg_collabs/mh3G", "background/collab/mh3G", 5 },
+    MH3RD = { "background/bg_collabs/mh3rd", "background/collab/mh3rd", 5 },
+    MIKU  = { "background/bg_collabs/miku", "background/collab/miku", 5 },
+    MOMOCLO = { "background/bg_collabs/momoclo", "background/collab/momoclo", 5 },
+    PZD   = { "background/bg_collabs/pzd", "background/collab/pzd", 5 },
+    TOHO  = { "background/bg_collabs/toho", "background/collab/toho", 5 },
+    TONKATSUDJ = { "background/bg_collabs/tonkatsudj", "background/collab/tonkatsudj", 1 },
+    TOUKEN = { "background/bg_collabs/touken", "background/collab/touken", 5 },
+    YMCK  = { "background/bg_collabs/ymck", "background/collab/ymck", 5 },
+    YOKAI = { "background/bg_collabs/yokai", "background/collab/yokai", 5 },
+    YOKAI_HATSUKOI = { "background/bg_collabs/yokai_hatsukoi", "background/collab/yokai_hatsukoi", 5 },
+    YOKAI_MATSURI = { "background/bg_collabs/yokai_matsuri", "background/collab/yokai_matsuri", 5 },
+    YOKAI_TOKOROTEN = { "background/bg_collabs/yokai_tokoroten", "background/collab/yokai_tokoroten", 5 },
+    YOKAI_YOUGOTA = { "background/bg_collabs/yokai_yougota", "background/collab/yokai_yougota", 5 },
 }

 Background                = {}
@@ -171,7 +135,7 @@ function Background.new(player_num, bpm, scene_preset)
    self.pack = pack
    local entry = (not pack) and (not self.is_2p) and scene_preset and COLLABS[scene_preset] or nil
    if entry then
-        local ctor, path, max_dancers = entry[1], entry[2], entry[3]
+        local ctor, path, max_dancers = require(entry[1]).new, entry[2], entry[3]
        if path then
            self.collab = ctor(player_num, bpm, path, max_dancers)
        else
@@ -1,92 +1,58 @@
-- YataiDON-HSS override of PyTaikoGreen/background/bg_collabs/tutorial.lua: tile steps/scroll period use x2[1]; +40/-80/+30 px literals *sc
-local DonBG = require("background/bg_objects/donbg")
-local DonBGBase = require("background/bg_objects/donbg/base")
+-- YataiDONNijiiro tutorial background: the layers in Graphics/background/tutorial_ac on their
+-- own timelines (bg_data/tutorial_ac): pattern, mountains, clouds and four wave rows scroll left
+-- (loop 320 frames), the clouds and waves bob (120 frames), the floor stands still. The screen
+-- keeps a black band above (y < 60) and below (y >= 1020) the art.

-local TutorialDonBG = setmetatable({}, { __index = DonBGBase })
-TutorialDonBG.__index = TutorialDonBG
+local TRACKS = require("background/bg_data/tutorial_ac")
+local L = TRACKS.layers

-function TutorialDonBG.new(index, player_num, path)
-    local self = setmetatable({}, TutorialDonBG)
-    local base = DonBGBase.new(index, player_num, path)
-    for k, v in pairs(base) do
-        self[k] = v
-    end
-    self.move = anim.move(6000, { total_distance = -self.bg_texture.x2[1], loop = true })
-    self.move:start()
-    self.overlay_move = tex.get_animation(2, "background")
-    self.overlay_texture = tex.get_texture_info(self.name, "overlay")
-    self.footer_texture = tex.get_texture_info(self.name, "footer")
-    self._id_overlay = tex.get_texture(self.path .. "/" .. self.name .. "/overlay") or 0
-    self._id_footer  = tex.get_texture(self.path .. "/" .. self.name .. "/footer") or 0
-    return self
-end
-
-function TutorialDonBG:update(current_time_ms)
-    DonBGBase.update(self, current_time_ms)
-    self.overlay_move:update(current_time_ms)
-end
-
-function TutorialDonBG:draw_textures(fade, y, frame)
-    local sc = tex.get_screen_scale()
-    y = y + 40 * sc
-    for i = 0, 4 do
-        tex.draw_texture(self._id_bg, {
-            frame = 0,
-            fade = fade,
-            x = (i * self.bg_texture.x2[1]) + self.move.attribute,
-            y = y
-        })
-        tex.draw_texture(self._id_bg, {
-            frame = 1,
-            fade = fade,
-            x = (i * self.bg_texture.x2[1]) + self.move.attribute,
-            y = y
-        })
-    end
-    for i = 0, 5 do
-        tex.draw_texture(self._id_overlay, {
-            frame = frame,
-            fade = fade,
-            x = (i * self.overlay_texture.x2[1]) +
-                self.move.attribute * (self.overlay_texture.width / self.bg_texture.width),
-            y = y + self.overlay_move.attribute
-        })
-    end
-    for i = 0, 4 do
-        tex.draw_texture(self._id_footer, {
-            frame = 0,
-            fade = fade,
-            x = (i * self.footer_texture.x2[1]) +
-                self.move.attribute * (self.footer_texture.width / self.bg_texture.width),
-            y = y + self.overlay_move.attribute
-        })
-        tex.draw_texture(self._id_footer, {
-            frame = 1,
-            fade = fade,
-            x = (i * (self.footer_texture.x2[1] - 80 * sc)) +
-                self.move.attribute * (self.footer_texture.width / self.bg_texture.width),
-            y = (y + 30 * sc) + self.overlay_move.attribute
-        })
-    end
-end
+local FOLDER = "tutorial_ac"
+local PATH = "background/" .. FOLDER
+local FRAME_MS = 1000.0 / 60.0
+local BAND_TOP = 60
+local CLOUD_X0, CLOUD_PITCH, CLOUD_COUNT = 600, 744, 5 -- the clouds' places inside their strip
+local CLOUD_Y0 = 30                                     -- the cloud's own offset in its exported frame

 TutorialBackground = {}
 TutorialBackground.__index = TutorialBackground

-local COLLAB_PATH = "background/collab/tutorial"
-
 function TutorialBackground.new(player_num, bpm)
    local self = setmetatable({}, TutorialBackground)
-
-    tex.load_folder(COLLAB_PATH, "bg_normal/bg_0")
-    self.donbg = TutorialDonBG.new(1, player_num, COLLAB_PATH)
-    self._id_bg_0 = tex.get_texture(COLLAB_PATH .. "/bg_0/background") or 0
-
+    tex.load_folder("background", FOLDER)
+    self.id = {}
+    for _, name in ipairs({ "pat", "mtn", "cloud", "w13", "w16", "w21", "w24", "floor" }) do
+        self.id[name] = tex.get_texture(PATH .. "/" .. name) or 0
+    end
+    self.t0 = nil
+    self.f = 0
    return self
 end

 function TutorialBackground:update(current_ms, bpm)
-    self.donbg:update(current_ms)
+    if not self.t0 then self.t0 = current_ms end
+    self.f = math.max(0, math.floor((current_ms - self.t0) / FRAME_MS))
+end
+
+local function at(track, list, f, n)
+    return track[list][(f % n) + 1]
+end
+
+-- whole pixels: drawn between pixels, the filtered layers came out soft
+local function px(v)
+    return math.floor(v + 0.5)
+end
+
+-- a strip whose x / y follow its track; rows above the top band are cut off
+function TutorialBackground:strip(name, track_name, f)
+    local tr = TRACKS[track_name]
+    local x = px(at(tr, "x", f, tr.n))
+    local y = name == "pat" and 0 or (name == "mtn" and 0 or at(tr, "y", f, 120))
+    local top = px(y + L[name].ytop)
+    local cut = math.max(0, BAND_TOP - top)
+    tex.draw_texture(self.id[name], {
+        x = x, y = top + cut, y2 = -cut,
+        src = { x = 0, y = cut, width = L[name].w, height = L[name].h - cut },
+    })
 end

 function TutorialBackground:handle_good(player_num) end
@@ -102,15 +68,25 @@ function TutorialBackground:handle_balloon(player_num) end
 function TutorialBackground:handle_gauge(player_num, progress, is_clear, is_rainbow) end

 function TutorialBackground:draw_back()
-    self.donbg:draw()
-    tex.draw_texture(self._id_bg_0)
+    local f = self.f
+    tex.draw_texture(self.id.floor, { y = L.floor.y })
+    self:strip("pat", "pat", f)
+    self:strip("mtn", "mtn", f)
+    local cx = at(TRACKS.cloud, "x", f, TRACKS.cloud.n)
+    local cy = at(TRACKS.c9, "y", f, 120) - CLOUD_Y0
+    for k = 0, CLOUD_COUNT - 1 do
+        tex.draw_texture(self.id.cloud, { x = px(cx + CLOUD_X0 + CLOUD_PITCH * k + L.cloud.dx), y = px(cy + L.cloud.dy) })
+    end
+    self:strip("w13", "w13", f)
+    self:strip("w16", "w16", f)
+    self:strip("w21", "w21", f)
+    self:strip("w24", "w24", f)
 end

 function TutorialBackground:draw_fore() end

 function TutorialBackground:destroy()
-    self.donbg:destroy()
-    tex.unload_folder(COLLAB_PATH, "bg_normal/bg_0")
+    tex.unload_folder("background", FOLDER)
 end

 return TutorialBackground
@@ -0,0 +1,21 @@
+-- GENERATED: the tutorial background's layer tracks.
+-- x/y per 60 fps frame; x tracks loop at their wrap.
+return {
+  pat = { n = 320, x = { 0, -2.3, -4.65, -6.95, -9.25, -11.55, -13.9, -16.2, -18.5, -20.85, -23.15, -25.45, -27.75, -30.1, -32.4, -34.7, -37, -39.35, -41.65, -43.95, -46.3, -48.6, -50.9, -53.2, -55.55, -57.85, -60.15, -62.45, -64.75, -67.1, -69.4, -71.7, -74.05, -76.35, -78.65, -80.95, -83.3, -85.6, -87.9, -90.2, -92.55, -94.85, -97.15, -99.5, -101.8, -104.1, -106.4, -108.75, -111.05, -113.35, -115.65, -118, -120.3, -122.6, -124.95, -127.25, -129.55, -131.85, -134.2, -136.5, -138.8, -141.1, -143.45, -145.75, -148.05, -150.4, -152.7, -155, -157.3, -159.6, -161.95, -164.25, -166.55, -168.9, -171.2, -173.5, -175.85, -178.15, -180.45, -182.75, -185.05, -187.4, -189.7, -192, -194.35, -196.65, -198.95, -201.25, -203.6, -205.9, -208.2, -210.5, -212.85, -215.15, -217.5, -219.8, -222.1, -224.4, -226.7, -229.05, -231.35, -233.65, -235.95, -238.3, -240.6, -242.9, -245.25, -247.55, -249.85, -252.15, -254.5, -256.8, -259.1, -261.4, -263.75, -266.05, -268.35, -270.7, -273, -275.3, -277.6, -279.95, -282.25, -284.55, -286.85, -289.2, -291.5, -293.8, -296.15, -298.45, -300.75, -303.05, -305.35, -307.7, -310, -312.35, -314.65, -316.95, -319.25, -321.55, -323.9, -326.2, -328.5, -330.85, -333.15, -335.45, -337.75, -340.1, -342.4, -344.7, -347, -349.35, -351.65, -353.95, -356.25, -358.6, -360.9, -363.2, -365.55, -367.85, -370.15, -372.45, -374.8, -377.1, -379.4, -381.75, -384.05, -386.35, -388.65, -391, -393.3, -395.6, -397.9, -400.25, -402.55, -404.85, -407.15, -409.5, -411.8, -414.1, -416.45, -418.75, -421.05, -423.35, -425.7, -428, -430.3, -432.6, -434.95, -437.25, -439.55, -441.85, -444.2, -446.5, -448.8, -451.1, -453.45, -455.75, -458.1, -460.4, -462.7, -465, -467.3, -469.65, -471.95, -474.25, -476.6, -478.9, -481.2, -483.5, -485.85, -488.15, -490.45, -492.75, -495.1, -497.4, -499.7, -502.05, -504.35, -506.65, -508.95, -511.3, -513.6, -515.9, -518.2, -520.55, -522.85, -525.15, -527.45, -529.8, -532.1, -534.4, -536.75, -539.05, -541.35, -543.65, -546, -548.3, -550.6, -552.95, -555.25, -557.55, -559.85, -562.15, -564.5, -566.8, -569.1, -571.45, -573.75, -576.05, -578.4, -580.7, -583, -585.3, -587.6, -589.95, -592.25, -594.55, -596.9, -599.2, -601.5, -603.8, -606.15, -608.45, -610.75, -613.05, -615.4, -617.7, -620, -622.35, -624.65, -626.95, -629.25, -631.6, -633.9, -636.2, -638.5, -640.85, -643.15, -645.45, -647.8, -650.1, -652.4, -654.7, -657.05, -659.35, -661.65, -663.95, -666.3, -668.6, -670.9, -673.25, -675.55, -677.85, -680.15, -682.45, -684.8, -687.1, -689.4, -691.75, -694.05, -696.35, -698.65, -701, -703.3, -705.6, -707.9, -710.25, -712.55, -714.85, -717.2, -719.5, -721.8, -724.1, -726.45, -728.75, -731.05, -733.35, -735.7, -738 },
+        y = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } },
+  mtn = { n = 320, x = { 0, -2.35, -4.65, -7, -9.35, -11.65, -14, -16.35, -18.65, -21, -23.3, -25.65, -28, -30.35, -32.65, -35, -37.3, -39.65, -42, -44.3, -46.65, -48.95, -51.3, -53.65, -56, -58.3, -60.65, -62.95, -65.3, -67.65, -69.95, -72.3, -74.65, -76.95, -79.3, -81.6, -83.95, -86.3, -88.65, -90.95, -93.3, -95.65, -97.95, -100.3, -102.6, -104.95, -107.3, -109.6, -111.95, -114.3, -116.6, -118.95, -121.3, -123.6, -125.95, -128.25, -130.6, -132.95, -135.3, -137.6, -139.95, -142.25, -144.6, -146.95, -149.25, -151.6, -153.95, -156.25, -158.6, -160.9, -163.25, -165.6, -167.95, -170.25, -172.6, -174.9, -177.25, -179.6, -181.9, -184.25, -186.6, -188.9, -191.25, -193.6, -195.9, -198.25, -200.6, -202.9, -205.25, -207.55, -209.9, -212.25, -214.55, -216.9, -219.25, -221.55, -223.9, -226.25, -228.55, -230.9, -233.2, -235.55, -237.9, -240.25, -242.55, -244.9, -247.2, -249.55, -251.9, -254.2, -256.55, -258.9, -261.2, -263.55, -265.85, -268.2, -270.55, -272.9, -275.2, -277.55, -279.9, -282.2, -284.55, -286.85, -289.2, -291.55, -293.85, -296.2, -298.55, -300.85, -303.2, -305.55, -307.85, -310.2, -312.55, -314.85, -317.2, -319.55, -321.85, -324.2, -326.5, -328.85, -331.2, -333.5, -335.85, -338.2, -340.5, -342.85, -345.15, -347.5, -349.85, -352.2, -354.5, -356.85, -359.15, -361.5, -363.85, -366.15, -368.5, -370.85, -373.15, -375.5, -377.85, -380.15, -382.5, -384.85, -387.15, -389.5, -391.8, -394.15, -396.5, -398.85, -401.15, -403.5, -405.8, -408.15, -410.5, -412.8, -415.15, -417.5, -419.8, -422.15, -424.45, -426.8, -429.15, -431.5, -433.8, -436.15, -438.45, -440.8, -443.15, -445.45, -447.8, -450.15, -452.45, -454.8, -457.15, -459.45, -461.8, -464.15, -466.45, -468.8, -471.1, -473.45, -475.8, -478.1, -480.45, -482.8, -485.1, -487.45, -489.8, -492.1, -494.45, -496.8, -499.1, -501.45, -503.75, -506.1, -508.45, -510.75, -513.1, -515.45, -517.75, -520.1, -522.45, -524.75, -527.1, -529.45, -531.75, -534.1, -536.45, -538.75, -541.1, -543.4, -545.75, -548.1, -550.4, -552.75, -555.1, -557.4, -559.75, -562.1, -564.4, -566.75, -569.1, -571.4, -573.75, -576.05, -578.4, -580.75, -583.1, -585.4, -587.75, -590.05, -592.4, -594.75, -597.05, -599.4, -601.75, -604.05, -606.4, -608.7, -611.05, -613.4, -615.75, -618.05, -620.4, -622.7, -625.05, -627.4, -629.7, -632.05, -634.4, -636.7, -639.05, -641.4, -643.7, -646.05, -648.4, -650.7, -653.05, -655.35, -657.7, -660.05, -662.4, -664.7, -667.05, -669.35, -671.7, -674.05, -676.35, -678.7, -681.05, -683.35, -685.7, -688, -690.35, -692.7, -695.05, -697.35, -699.7, -702, -704.35, -706.7, -709, -711.35, -713.7, -716, -718.35, -720.7, -723, -725.35, -727.65, -730, -732.35, -734.65, -737, -739.35, -741.65, -744 },
+        y = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } },
+  cloud = { n = 320, x = { -744, -746.35, -748.65, -751, -753.35, -755.65, -758, -760.35, -762.65, -765, -767.3, -769.65, -772, -774.35, -776.65, -779, -781.3, -783.65, -786, -788.3, -790.65, -792.95, -795.3, -797.65, -800, -802.3, -804.65, -806.95, -809.3, -811.65, -813.95, -816.3, -818.65, -820.95, -823.3, -825.6, -827.95, -830.3, -832.65, -834.95, -837.3, -839.65, -841.95, -844.3, -846.6, -848.95, -851.3, -853.6, -855.95, -858.3, -860.6, -862.95, -865.3, -867.6, -869.95, -872.25, -874.6, -876.95, -879.3, -881.6, -883.95, -886.25, -888.6, -890.95, -893.25, -895.6, -897.95, -900.25, -902.6, -904.9, -907.25, -909.6, -911.95, -914.25, -916.6, -918.9, -921.25, -923.6, -925.9, -928.25, -930.6, -932.9, -935.25, -937.6, -939.9, -942.25, -944.6, -946.9, -949.25, -951.55, -953.9, -956.25, -958.55, -960.9, -963.25, -965.55, -967.9, -970.25, -972.55, -974.9, -977.2, -979.55, -981.9, -984.25, -986.55, -988.9, -991.2, -993.55, -995.9, -998.2, -1000.5, -1002.9, -1005.2, -1007.5, -1009.8, -1012.2, -1014.5, -1016.9, -1019.2, -1021.5, -1023.9, -1026.2, -1028.6, -1030.8, -1033.2, -1035.6, -1037.8, -1040.2, -1042.6, -1044.8, -1047.2, -1049.6, -1051.8, -1054.2, -1056.6, -1058.8, -1061.2, -1063.6, -1065.8, -1068.2, -1070.5, -1072.8, -1075.2, -1077.5, -1079.8, -1082.2, -1084.5, -1086.8, -1089.2, -1091.5, -1093.8, -1096.2, -1098.5, -1100.8, -1103.2, -1105.5, -1107.8, -1110.2, -1112.5, -1114.8, -1117.2, -1119.5, -1121.8, -1124.2, -1126.5, -1128.8, -1131.2, -1133.5, -1135.8, -1138.2, -1140.5, -1142.8, -1145.2, -1147.5, -1149.8, -1152.2, -1154.5, -1156.8, -1159.2, -1161.5, -1163.8, -1166.2, -1168.4, -1170.8, -1173.2, -1175.5, -1177.8, -1180.2, -1182.4, -1184.8, -1187.2, -1189.4, -1191.8, -1194.2, -1196.4, -1198.8, -1201.2, -1203.4, -1205.8, -1208.2, -1210.4, -1212.8, -1215.1, -1217.4, -1219.8, -1222.1, -1224.4, -1226.8, -1229.1, -1231.4, -1233.8, -1236.1, -1238.4, -1240.8, -1243.1, -1245.4, -1247.8, -1250.1, -1252.4, -1254.8, -1257.1, -1259.4, -1261.8, -1264.1, -1266.4, -1268.8, -1271.1, -1273.4, -1275.8, -1278.1, -1280.4, -1282.8, -1285.1, -1287.4, -1289.8, -1292.1, -1294.4, -1296.8, -1299.1, -1301.4, -1303.8, -1306.1, -1308.4, -1310.8, -1313.1, -1315.4, -1317.8, -1320.1, -1322.4, -1324.8, -1327.1, -1329.4, -1331.8, -1334.1, -1336.4, -1338.8, -1341.1, -1343.4, -1345.8, -1348.1, -1350.4, -1352.7, -1355.1, -1357.4, -1359.8, -1362.1, -1364.4, -1366.7, -1369.1, -1371.4, -1373.7, -1376.1, -1378.4, -1380.7, -1383.1, -1385.4, -1387.7, -1390.1, -1392.4, -1394.7, -1397.1, -1399.3, -1401.7, -1404.1, -1406.4, -1408.7, -1411.1, -1413.3, -1415.7, -1418.1, -1420.3, -1422.7, -1425.1, -1427.3, -1429.7, -1432, -1434.3, -1436.7, -1439.1, -1441.3, -1443.7, -1446, -1448.3, -1450.7, -1453, -1455.3, -1457.7, -1460, -1462.3, -1464.7, -1467, -1469.3, -1471.7, -1474, -1476.3, -1478.7, -1481, -1483.3, -1485.7, -1488 },
+        y = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } },
+  w13 = { n = 320, x = { 0, -2.35, -4.65, -7, -9.35, -11.65, -14, -16.35, -18.65, -21, -23.3, -25.65, -28, -30.35, -32.65, -35, -37.3, -39.65, -42, -44.3, -46.65, -48.95, -51.3, -53.65, -56, -58.3, -60.65, -62.95, -65.3, -67.65, -69.95, -72.3, -74.65, -76.95, -79.3, -81.6, -83.95, -86.3, -88.65, -90.95, -93.3, -95.65, -97.95, -100.3, -102.6, -104.95, -107.3, -109.6, -111.95, -114.3, -116.6, -118.95, -121.3, -123.6, -125.95, -128.25, -130.6, -132.95, -135.3, -137.6, -139.95, -142.25, -144.6, -146.95, -149.25, -151.6, -153.95, -156.25, -158.6, -160.9, -163.25, -165.6, -167.95, -170.25, -172.6, -174.9, -177.25, -179.6, -181.9, -184.25, -186.6, -188.9, -191.25, -193.6, -195.9, -198.25, -200.6, -202.9, -205.25, -207.55, -209.9, -212.25, -214.55, -216.9, -219.25, -221.55, -223.9, -226.25, -228.55, -230.9, -233.2, -235.55, -237.9, -240.25, -242.55, -244.9, -247.2, -249.55, -251.9, -254.2, -256.55, -258.9, -261.2, -263.55, -265.85, -268.2, -270.55, -272.9, -275.2, -277.55, -279.9, -282.2, -284.55, -286.85, -289.2, -291.55, -293.85, -296.2, -298.55, -300.85, -303.2, -305.55, -307.85, -310.2, -312.55, -314.85, -317.2, -319.55, -321.85, -324.2, -326.5, -328.85, -331.2, -333.5, -335.85, -338.2, -340.5, -342.85, -345.15, -347.5, -349.85, -352.2, -354.5, -356.85, -359.15, -361.5, -363.85, -366.15, -368.5, -370.85, -373.15, -375.5, -377.85, -380.15, -382.5, -384.85, -387.15, -389.5, -391.8, -394.15, -396.5, -398.85, -401.15, -403.5, -405.8, -408.15, -410.5, -412.8, -415.15, -417.5, -419.8, -422.15, -424.45, -426.8, -429.15, -431.5, -433.8, -436.15, -438.45, -440.8, -443.15, -445.45, -447.8, -450.15, -452.45, -454.8, -457.15, -459.45, -461.8, -464.15, -466.45, -468.8, -471.1, -473.45, -475.8, -478.1, -480.45, -482.8, -485.1, -487.45, -489.8, -492.1, -494.45, -496.8, -499.1, -501.45, -503.75, -506.1, -508.45, -510.75, -513.1, -515.45, -517.75, -520.1, -522.45, -524.75, -527.1, -529.45, -531.75, -534.1, -536.45, -538.75, -541.1, -543.4, -545.75, -548.1, -550.4, -552.75, -555.1, -557.4, -559.75, -562.1, -564.4, -566.75, -569.1, -571.4, -573.75, -576.05, -578.4, -580.75, -583.1, -585.4, -587.75, -590.05, -592.4, -594.75, -597.05, -599.4, -601.75, -604.05, -606.4, -608.7, -611.05, -613.4, -615.75, -618.05, -620.4, -622.7, -625.05, -627.4, -629.7, -632.05, -634.4, -636.7, -639.05, -641.4, -643.7, -646.05, -648.4, -650.7, -653.05, -655.35, -657.7, -660.05, -662.4, -664.7, -667.05, -669.35, -671.7, -674.05, -676.35, -678.7, -681.05, -683.35, -685.7, -688, -690.35, -692.7, -695.05, -697.35, -699.7, -702, -704.35, -706.7, -709, -711.35, -713.7, -716, -718.35, -720.7, -723, -725.35, -727.65, -730, -732.35, -734.65, -737, -739.35, -741.65, -744 },
+        y = { 339, 338.8, 338.6, 338.4, 338.2, 338, 337.8, 337.6, 337.35, 337.15, 336.95, 336.75, 336.55, 336.35, 336.15, 335.95, 335.75, 335.55, 335.35, 335.15, 334.95, 334.75, 334.55, 334.3, 334.1, 333.9, 333.7, 333.5, 333.3, 333.1, 332.9, 332.7, 332.5, 332.3, 332.1, 331.9, 331.7, 331.45, 331.25, 331.05, 330.85, 330.65, 330.45, 330.25, 330.05, 329.85, 329.65, 329.45, 329.25, 329.05, 328.85, 328.65, 328.4, 328.2, 328, 327.8, 327.6, 327.4, 327.2, 327, 327.2, 327.4, 327.6, 327.8, 328, 328.2, 328.4, 328.6, 328.8, 329, 329.2, 329.4, 329.6, 329.8, 330, 330.2, 330.4, 330.6, 330.8, 331, 331.2, 331.4, 331.6, 331.8, 332, 332.2, 332.4, 332.6, 332.8, 333, 333.2, 333.4, 333.6, 333.8, 334, 334.2, 334.4, 334.6, 334.8, 335, 335.2, 335.4, 335.6, 335.8, 336, 336.2, 336.4, 336.6, 336.8, 337, 337.2, 337.4, 337.6, 337.8, 338, 338.2, 338.4, 338.6, 338.8, 339 } },
+  w16 = { n = 320, x = { 0, -2.35, -4.65, -7, -9.35, -11.65, -14, -16.35, -18.65, -21, -23.3, -25.65, -28, -30.35, -32.65, -35, -37.3, -39.65, -42, -44.3, -46.65, -48.95, -51.3, -53.65, -56, -58.3, -60.65, -62.95, -65.3, -67.65, -69.95, -72.3, -74.65, -76.95, -79.3, -81.6, -83.95, -86.3, -88.65, -90.95, -93.3, -95.65, -97.95, -100.3, -102.6, -104.95, -107.3, -109.6, -111.95, -114.3, -116.6, -118.95, -121.3, -123.6, -125.95, -128.25, -130.6, -132.95, -135.3, -137.6, -139.95, -142.25, -144.6, -146.95, -149.25, -151.6, -153.95, -156.25, -158.6, -160.9, -163.25, -165.6, -167.95, -170.25, -172.6, -174.9, -177.25, -179.6, -181.9, -184.25, -186.6, -188.9, -191.25, -193.6, -195.9, -198.25, -200.6, -202.9, -205.25, -207.55, -209.9, -212.25, -214.55, -216.9, -219.25, -221.55, -223.9, -226.25, -228.55, -230.9, -233.2, -235.55, -237.9, -240.25, -242.55, -244.9, -247.2, -249.55, -251.9, -254.2, -256.55, -258.9, -261.2, -263.55, -265.85, -268.2, -270.55, -272.9, -275.2, -277.55, -279.9, -282.2, -284.55, -286.85, -289.2, -291.55, -293.85, -296.2, -298.55, -300.85, -303.2, -305.55, -307.85, -310.2, -312.55, -314.85, -317.2, -319.55, -321.85, -324.2, -326.5, -328.85, -331.2, -333.5, -335.85, -338.2, -340.5, -342.85, -345.15, -347.5, -349.85, -352.2, -354.5, -356.85, -359.15, -361.5, -363.85, -366.15, -368.5, -370.85, -373.15, -375.5, -377.85, -380.15, -382.5, -384.85, -387.15, -389.5, -391.8, -394.15, -396.5, -398.85, -401.15, -403.5, -405.8, -408.15, -410.5, -412.8, -415.15, -417.5, -419.8, -422.15, -424.45, -426.8, -429.15, -431.5, -433.8, -436.15, -438.45, -440.8, -443.15, -445.45, -447.8, -450.15, -452.45, -454.8, -457.15, -459.45, -461.8, -464.15, -466.45, -468.8, -471.1, -473.45, -475.8, -478.1, -480.45, -482.8, -485.1, -487.45, -489.8, -492.1, -494.45, -496.8, -499.1, -501.45, -503.75, -506.1, -508.45, -510.75, -513.1, -515.45, -517.75, -520.1, -522.45, -524.75, -527.1, -529.45, -531.75, -534.1, -536.45, -538.75, -541.1, -543.4, -545.75, -548.1, -550.4, -552.75, -555.1, -557.4, -559.75, -562.1, -564.4, -566.75, -569.1, -571.4, -573.75, -576.05, -578.4, -580.75, -583.1, -585.4, -587.75, -590.05, -592.4, -594.75, -597.05, -599.4, -601.75, -604.05, -606.4, -608.7, -611.05, -613.4, -615.75, -618.05, -620.4, -622.7, -625.05, -627.4, -629.7, -632.05, -634.4, -636.7, -639.05, -641.4, -643.7, -646.05, -648.4, -650.7, -653.05, -655.35, -657.7, -660.05, -662.4, -664.7, -667.05, -669.35, -671.7, -674.05, -676.35, -678.7, -681.05, -683.35, -685.7, -688, -690.35, -692.7, -695.05, -697.35, -699.7, -702, -704.35, -706.7, -709, -711.35, -713.7, -716, -718.35, -720.7, -723, -725.35, -727.65, -730, -732.35, -734.65, -737, -739.35, -741.65, -744 },
+        y = { 345, 345.5, 346, 346.55, 347.05, 347.55, 348.05, 348.55, 349.05, 349.6, 350.1, 350.6, 351.1, 351.6, 352.1, 352.65, 353.15, 353.65, 354.15, 354.65, 355.15, 355.7, 356.2, 356.7, 357.2, 357.7, 358.2, 358.75, 359.25, 359.75, 360.25, 360.75, 361.25, 361.8, 362.3, 362.8, 363.3, 363.8, 364.3, 364.85, 365.35, 365.85, 366.35, 366.85, 367.35, 367.9, 368.4, 368.9, 369.4, 369.9, 370.4, 370.95, 371.45, 371.95, 372.45, 372.95, 373.45, 374, 374.5, 375, 374.5, 374, 373.5, 373, 372.5, 372, 371.5, 371, 370.5, 370, 369.5, 369, 368.5, 368, 367.5, 367, 366.5, 366, 365.5, 365, 364.5, 364, 363.5, 363, 362.5, 362, 361.5, 361, 360.5, 360, 359.5, 359, 358.5, 358, 357.5, 357, 356.5, 356, 355.5, 355, 354.5, 354, 353.5, 353, 352.5, 352, 351.5, 351, 350.5, 350, 349.5, 349, 348.5, 348, 347.5, 347, 346.5, 346, 345.5, 345 } },
+  w21 = { n = 320, x = { 0, -2.35, -4.65, -7, -9.35, -11.65, -14, -16.35, -18.65, -21, -23.3, -25.65, -28, -30.35, -32.65, -35, -37.3, -39.65, -42, -44.3, -46.65, -48.95, -51.3, -53.65, -56, -58.3, -60.65, -62.95, -65.3, -67.65, -69.95, -72.3, -74.65, -76.95, -79.3, -81.6, -83.95, -86.3, -88.65, -90.95, -93.3, -95.65, -97.95, -100.3, -102.6, -104.95, -107.3, -109.6, -111.95, -114.3, -116.6, -118.95, -121.3, -123.6, -125.95, -128.25, -130.6, -132.95, -135.3, -137.6, -139.95, -142.25, -144.6, -146.95, -149.25, -151.6, -153.95, -156.25, -158.6, -160.9, -163.25, -165.6, -167.95, -170.25, -172.6, -174.9, -177.25, -179.6, -181.9, -184.25, -186.6, -188.9, -191.25, -193.6, -195.9, -198.25, -200.6, -202.9, -205.25, -207.55, -209.9, -212.25, -214.55, -216.9, -219.25, -221.55, -223.9, -226.25, -228.55, -230.9, -233.2, -235.55, -237.9, -240.25, -242.55, -244.9, -247.2, -249.55, -251.9, -254.2, -256.55, -258.9, -261.2, -263.55, -265.85, -268.2, -270.55, -272.9, -275.2, -277.55, -279.9, -282.2, -284.55, -286.85, -289.2, -291.55, -293.85, -296.2, -298.55, -300.85, -303.2, -305.55, -307.85, -310.2, -312.55, -314.85, -317.2, -319.55, -321.85, -324.2, -326.5, -328.85, -331.2, -333.5, -335.85, -338.2, -340.5, -342.85, -345.15, -347.5, -349.85, -352.2, -354.5, -356.85, -359.15, -361.5, -363.85, -366.15, -368.5, -370.85, -373.15, -375.5, -377.85, -380.15, -382.5, -384.85, -387.15, -389.5, -391.8, -394.15, -396.5, -398.85, -401.15, -403.5, -405.8, -408.15, -410.5, -412.8, -415.15, -417.5, -419.8, -422.15, -424.45, -426.8, -429.15, -431.5, -433.8, -436.15, -438.45, -440.8, -443.15, -445.45, -447.8, -450.15, -452.45, -454.8, -457.15, -459.45, -461.8, -464.15, -466.45, -468.8, -471.1, -473.45, -475.8, -478.1, -480.45, -482.8, -485.1, -487.45, -489.8, -492.1, -494.45, -496.8, -499.1, -501.45, -503.75, -506.1, -508.45, -510.75, -513.1, -515.45, -517.75, -520.1, -522.45, -524.75, -527.1, -529.45, -531.75, -534.1, -536.45, -538.75, -541.1, -543.4, -545.75, -548.1, -550.4, -552.75, -555.1, -557.4, -559.75, -562.1, -564.4, -566.75, -569.1, -571.4, -573.75, -576.05, -578.4, -580.75, -583.1, -585.4, -587.75, -590.05, -592.4, -594.75, -597.05, -599.4, -601.75, -604.05, -606.4, -608.7, -611.05, -613.4, -615.75, -618.05, -620.4, -622.7, -625.05, -627.4, -629.7, -632.05, -634.4, -636.7, -639.05, -641.4, -643.7, -646.05, -648.4, -650.7, -653.05, -655.35, -657.7, -660.05, -662.4, -664.7, -667.05, -669.35, -671.7, -674.05, -676.35, -678.7, -681.05, -683.35, -685.7, -688, -690.35, -692.7, -695.05, -697.35, -699.7, -702, -704.35, -706.7, -709, -711.35, -713.7, -716, -718.35, -720.7, -723, -725.35, -727.65, -730, -732.35, -734.65, -737, -739.35, -741.65, -744 },
+        y = { 384, 383.85, 383.75, 383.6, 383.45, 383.3, 383.2, 383.05, 382.9, 382.8, 382.65, 382.5, 382.35, 382.25, 382.1, 381.95, 381.85, 381.7, 381.55, 381.4, 381.3, 381.15, 381, 380.9, 380.75, 380.6, 380.45, 380.35, 380.2, 380.05, 379.95, 379.8, 379.65, 379.55, 379.4, 379.25, 379.1, 379, 378.85, 378.7, 378.6, 378.45, 378.3, 378.15, 378.05, 377.9, 377.75, 377.65, 377.5, 377.35, 377.2, 377.1, 376.95, 376.8, 376.7, 376.55, 376.4, 376.25, 376.15, 376, 376.15, 376.25, 376.4, 376.55, 376.65, 376.8, 376.95, 377.05, 377.2, 377.35, 377.45, 377.6, 377.75, 377.85, 378, 378.15, 378.25, 378.4, 378.55, 378.65, 378.8, 378.95, 379.05, 379.2, 379.35, 379.45, 379.6, 379.75, 379.85, 380, 380.15, 380.25, 380.4, 380.55, 380.65, 380.8, 380.95, 381.05, 381.2, 381.35, 381.45, 381.6, 381.75, 381.85, 382, 382.15, 382.25, 382.4, 382.55, 382.65, 382.8, 382.95, 383.05, 383.2, 383.35, 383.45, 383.6, 383.75, 383.85, 384 } },
+  w24 = { n = 320, x = { 0, -2.35, -4.65, -7, -9.35, -11.65, -14, -16.35, -18.65, -21, -23.3, -25.65, -28, -30.35, -32.65, -35, -37.3, -39.65, -42, -44.3, -46.65, -48.95, -51.3, -53.65, -56, -58.3, -60.65, -62.95, -65.3, -67.65, -69.95, -72.3, -74.65, -76.95, -79.3, -81.6, -83.95, -86.3, -88.65, -90.95, -93.3, -95.65, -97.95, -100.3, -102.6, -104.95, -107.3, -109.6, -111.95, -114.3, -116.6, -118.95, -121.3, -123.6, -125.95, -128.25, -130.6, -132.95, -135.3, -137.6, -139.95, -142.25, -144.6, -146.95, -149.25, -151.6, -153.95, -156.25, -158.6, -160.9, -163.25, -165.6, -167.95, -170.25, -172.6, -174.9, -177.25, -179.6, -181.9, -184.25, -186.6, -188.9, -191.25, -193.6, -195.9, -198.25, -200.6, -202.9, -205.25, -207.55, -209.9, -212.25, -214.55, -216.9, -219.25, -221.55, -223.9, -226.25, -228.55, -230.9, -233.2, -235.55, -237.9, -240.25, -242.55, -244.9, -247.2, -249.55, -251.9, -254.2, -256.55, -258.9, -261.2, -263.55, -265.85, -268.2, -270.55, -272.9, -275.2, -277.55, -279.9, -282.2, -284.55, -286.85, -289.2, -291.55, -293.85, -296.2, -298.55, -300.85, -303.2, -305.55, -307.85, -310.2, -312.55, -314.85, -317.2, -319.55, -321.85, -324.2, -326.5, -328.85, -331.2, -333.5, -335.85, -338.2, -340.5, -342.85, -345.15, -347.5, -349.85, -352.2, -354.5, -356.85, -359.15, -361.5, -363.85, -366.15, -368.5, -370.85, -373.15, -375.5, -377.85, -380.15, -382.5, -384.85, -387.15, -389.5, -391.8, -394.15, -396.5, -398.85, -401.15, -403.5, -405.8, -408.15, -410.5, -412.8, -415.15, -417.5, -419.8, -422.15, -424.45, -426.8, -429.15, -431.5, -433.8, -436.15, -438.45, -440.8, -443.15, -445.45, -447.8, -450.15, -452.45, -454.8, -457.15, -459.45, -461.8, -464.15, -466.45, -468.8, -471.1, -473.45, -475.8, -478.1, -480.45, -482.8, -485.1, -487.45, -489.8, -492.1, -494.45, -496.8, -499.1, -501.45, -503.75, -506.1, -508.45, -510.75, -513.1, -515.45, -517.75, -520.1, -522.45, -524.75, -527.1, -529.45, -531.75, -534.1, -536.45, -538.75, -541.1, -543.4, -545.75, -548.1, -550.4, -552.75, -555.1, -557.4, -559.75, -562.1, -564.4, -566.75, -569.1, -571.4, -573.75, -576.05, -578.4, -580.75, -583.1, -585.4, -587.75, -590.05, -592.4, -594.75, -597.05, -599.4, -601.75, -604.05, -606.4, -608.7, -611.05, -613.4, -615.75, -618.05, -620.4, -622.7, -625.05, -627.4, -629.7, -632.05, -634.4, -636.7, -639.05, -641.4, -643.7, -646.05, -648.4, -650.7, -653.05, -655.35, -657.7, -660.05, -662.4, -664.7, -667.05, -669.35, -671.7, -674.05, -676.35, -678.7, -681.05, -683.35, -685.7, -688, -690.35, -692.7, -695.05, -697.35, -699.7, -702, -704.35, -706.7, -709, -711.35, -713.7, -716, -718.35, -720.7, -723, -725.35, -727.65, -730, -732.35, -734.65, -737, -739.35, -741.65, -744 },
+        y = { 401, 401.5, 402, 402.55, 403.05, 403.55, 404.05, 404.55, 405.05, 405.6, 406.1, 406.6, 407.1, 407.6, 408.1, 408.65, 409.15, 409.65, 410.15, 410.65, 411.15, 411.7, 412.2, 412.7, 413.2, 413.7, 414.2, 414.75, 415.25, 415.75, 416.25, 416.75, 417.25, 417.8, 418.3, 418.8, 419.3, 419.8, 420.3, 420.85, 421.35, 421.85, 422.35, 422.85, 423.35, 423.9, 424.4, 424.9, 425.4, 425.9, 426.4, 426.95, 427.45, 427.95, 428.45, 428.95, 429.45, 430, 430.5, 431, 430.5, 430, 429.5, 429, 428.5, 428, 427.5, 427, 426.5, 426, 425.5, 425, 424.5, 424, 423.5, 423, 422.5, 422, 421.5, 421, 420.5, 420, 419.5, 419, 418.5, 418, 417.5, 417, 416.5, 416, 415.5, 415, 414.5, 414, 413.5, 413, 412.5, 412, 411.5, 411, 410.5, 410, 409.5, 409, 408.5, 408, 407.5, 407, 406.5, 406, 405.5, 405, 404.5, 404, 403.5, 403, 402.5, 402, 401.5, 401 } },
+  c9 = { n = 120, x = { -144, -146.35, -148.65, -151, -153.35, -155.65, -158, -160.35, -162.65, -165, -167.3, -169.65, -172, -174.35, -176.65, -179, -181.3, -183.65, -186, -188.3, -190.65, -192.95, -195.3, -197.65, -200, -202.3, -204.65, -206.95, -209.3, -211.65, -213.95, -216.3, -218.65, -220.95, -223.3, -225.6, -227.95, -230.3, -232.65, -234.95, -237.3, -239.65, -241.95, -244.3, -246.6, -248.95, -251.3, -253.6, -255.95, -258.3, -260.6, -262.95, -265.3, -267.6, -269.95, -272.25, -274.6, -276.95, -279.3, -281.6, -283.95, -286.25, -288.6, -290.95, -293.25, -295.6, -297.95, -300.25, -302.6, -304.9, -307.25, -309.6, -311.95, -314.25, -316.6, -318.9, -321.25, -323.6, -325.9, -328.25, -330.6, -332.9, -335.25, -337.6, -339.9, -342.25, -344.6, -346.9, -349.25, -351.55, -353.9, -356.25, -358.55, -360.9, -363.25, -365.55, -367.9, -370.25, -372.55, -374.9, -377.2, -379.55, -381.9, -384.25, -386.55, -388.9, -391.2, -393.55, -395.9, -398.2, -400.55, -402.9, -405.2, -407.55, -409.85, -412.2, -414.55, -416.9, -419.2, -421.55 },
+        y = { 282, 280.8, 279.65, 278.5, 277.35, 276.25, 275.2, 274.1, 273.05, 272.05, 271.05, 270.05, 269.1, 268.15, 267.2, 266.3, 265.45, 264.55, 263.7, 262.9, 262.1, 261.3, 260.55, 259.8, 259.1, 258.4, 257.7, 257.05, 256.4, 255.8, 255.2, 254.6, 254.05, 253.5, 253, 252.5, 252, 251.6, 251.2, 250.75, 250.35, 250, 249.65, 249.3, 249, 248.7, 248.4, 248.15, 247.95, 247.7, 247.5, 247.35, 247.2, 247.05, 246.95, 246.85, 246.8, 246.75, 246.7, 246.7, 246.75, 246.8, 246.85, 246.9, 247, 247.1, 247.25, 247.4, 247.55, 247.75, 247.95, 248.15, 248.4, 248.65, 248.95, 249.25, 249.6, 249.95, 250.3, 250.7, 251.1, 251.5, 251.95, 252.4, 252.9, 253.4, 253.9, 254.45, 255, 255.6, 256.2, 256.8, 257.45, 258.1, 258.8, 259.5, 260.2, 260.95, 261.7, 262.45, 263.25, 264.05, 264.8, 265.65, 266.55, 267.45, 268.35, 269.25, 270.25, 271.2, 272.2, 273.2, 274.25, 275.3, 276.35, 277.45, 278.55, 279.7, 280.85, 282 } },
+  layers = {pat = {ytop = 0, w = 2664, h = 416}, mtn = {ytop = 148, w = 2664, h = 202}, w13 = {ytop = -44, w = 2664, h = 96}, w16 = {ytop = -44, w = 2664, h = 96}, w21 = {ytop = -44, w = 2664, h = 96}, w24 = {ytop = -44, w = 2664, h = 96}, cloud = {dx = -288, dy = -161, w = 575, h = 383}, floor = {y = 668, h = 352}},
+}
@@ -26,6 +26,15 @@ local SORT_FOLDER_NAMES  = { ["曲検索"] = true, ["Search Song"] = true, ["搜
                             ["むずかしさからえらぶ"] = true, ["Diff Sort"] = true }
 local FOLDER_FRAME_EVENT, FOLDER_FRAME_SORT, FOLDER_FRAME_DANI = 11, 12, 10

+-- The tutorial folder (GENRE:TUTORIAL, genre index 0) is a howto board: the recent
+-- board's colours with its own characters (box_chara frame 10).
+local GENRE_TUTORIAL = 0
+local FOLDER_FRAME_HOWTO, CHARA_FRAME_HOWTO = 9, 10
+
+local function is_tutorial(box)
+    return box.genre_index ~= nil and box:genre_index() == GENRE_TUTORIAL
+end
+
 local SORT_COLLECTIONS  = { SEARCH = true, DIFFICULTY = true }
 local EVENT_COLLECTIONS = { NEW = true, RECOMMENDED = true }

@@ -39,6 +48,7 @@ local function folder_frame(box)
    end
    if box.kind and box:kind() == "dan" then return FOLDER_FRAME_DANI, false end
    if n and SORT_FOLDER_NAMES[n]  then return FOLDER_FRAME_SORT, false end
+    if is_tutorial(box) then return FOLDER_FRAME_HOWTO, false end
    return box:genre_frame(), false
 end

@@ -115,7 +125,7 @@ function SongSelect:draw_folder_board(box, pb, ch_alpha, ch_off, ta, glow_a)
    -- characters: texture has L at x=510 and R at x=1410
    if ch_alpha > 0 then
        local slide = 450.0 - ch_off
-        local gframe = box:genre_frame()
+        local gframe = is_tutorial(box) and CHARA_FRAME_HOWTO or box:genre_frame()
        tex.draw_texture(self._id_box_chara, { frame = gframe, x = bx - 960 + slide, y = by - 240, x2 = 960 - 1920, fade = fade * ch_alpha,
                                               src = { x = 0, y = 0, width = 960, height = 480 } })
        tex.draw_texture(self._id_box_chara, { frame = gframe, x = bx - slide, y = by - 240, x2 = 960 - 1920, fade = fade * ch_alpha,
@@ -0,0 +1,14 @@
+-- YataiDONNijiiro: the oni <-> ura change plays on the difficulty board (song_select.lua), so the
+-- engine's ura switch overlay draws nothing here (without this override the parent skin's art showed).
+UraSwitchAnimation = {}
+UraSwitchAnimation.__index = UraSwitchAnimation
+
+function UraSwitchAnimation.new()
+    return setmetatable({}, UraSwitchAnimation)
+end
+
+function UraSwitchAnimation:start(is_backwards) end
+
+function UraSwitchAnimation:update(current_ms) end
+
+function UraSwitchAnimation:draw() end
@@ -2784,6 +2784,15 @@ a1671a51159af679d1cf5b7b76fa589d1feedf3b80585926321f811eea63a5b4 *./Graphics/bac
 8943448cbd586d77411f01d81275f75ae12c5b991e147b0eb3ddff52d7059179 *./Graphics/background/renda/renda_1/5.png
 a2701d6ddd876dbc3f8dc2c9d54a79d4451dfb2da56c1fae855bf6212d600e1d *./Graphics/background/renda/renda_2.png
 2421a27612fa51e8af70ea10698b6ab2616bdc1e623e996327e11901cb652ba3 *./Graphics/background/renda/texture.json
+7dae02df0392ce513668e4929dee0362f3e3279c097b74dbcbac2a3ef36f706b *./Graphics/background/tutorial_ac/cloud.png
+d6b007e4fdb3e8dfe259ce8a591956bd3a8073dbfb8eded5c28a6d02b8dba4c9 *./Graphics/background/tutorial_ac/floor.png
+f8a44f4dc7386da694b3749f1a7b77c88b79bec584bc0cf48bc93a12742be8ab *./Graphics/background/tutorial_ac/mtn.png
+ff76783f5f03ca095e12b005cad93ef1c91748ddcf27755f16ff53c899851d15 *./Graphics/background/tutorial_ac/pat.png
+7c4957cbb71eb25e0b09964af536be1ed6d20c673cf4bb2c8e6452dd3b2ae879 *./Graphics/background/tutorial_ac/texture.json
+f75f0cf748c8dc1b9a4064bf52e49cc4f576db7be12521e0b4faca69bc3c7c26 *./Graphics/background/tutorial_ac/w13.png
+5c769eef89b09eb7c8393b6a5e83a7aa37ad8807a91791613ad1276d3985c7ae *./Graphics/background/tutorial_ac/w16.png
+f75f0cf748c8dc1b9a4064bf52e49cc4f576db7be12521e0b4faca69bc3c7c26 *./Graphics/background/tutorial_ac/w21.png
+9c87d21983b605b12ab7799948a47700488bf8f9d213aae754c18eef1e67b958 *./Graphics/background/tutorial_ac/w24.png
 205c62076d642767b84b4f4a2497f7ab48503135d76f48968fd6d0d4215acd66 *./Graphics/dan_loading/loading_dan/night.png
 7b909968ea0d233cf79a95a506e76d63256a4dc2aa85f72819fc44403f7f6417 *./Graphics/dan_loading/loading_dan/plaque/0.png
 6f544c0be29ff943b3913ca7a699a348a14e2d210e90b6cc1ad2a592ef7d4cbd *./Graphics/dan_loading/loading_dan/plaque/1.png
@@ -3884,7 +3893,7 @@ a6dea25ec50ac8784fe096c717f91d24807a8a22b16082541e9b915a9b31bc7d *./Graphics/gam
 b3f3073a122e5b731f262489db6adbf7d9ffaefab5afefd370e8bd18cc510cc4 *./Graphics/game/gogo_time/explosion.png
 eca6c501cbfd81c7b33b46ab81db554626ff2be54c1dd183e3493276dcaaccbf *./Graphics/game/gogo_time/fire.png
 797528e413b3427959312db5d8537fdce6331ba43a5b49903da0670211ebf2fa *./Graphics/game/gogo_time/lane_effect.png
-e3fb796cacd9ad7bf0769e8f6d19f55c9c61742b8a59a854fb45acdd406efc5e *./Graphics/game/gogo_time/texture.json
+cad8ea0282b4ec6d53c2b88e4094ec82c23fa235a466f4c20ea896ff0cfd0778 *./Graphics/game/gogo_time/texture.json
 72a272b7ec8c5efec469401cab07a43f9dcbcae81d1e2092c3e49078cdfd36a1 *./Graphics/game/hit_effect/firework.png
 3fc1ee33edfb7e99a61dae79d2abd0e018dbc1719a80c6834dcf697998b81c1e *./Graphics/game/hit_effect/hit_effect_good_big.png
 ffc4d9da64b8075ba6534644b97a8bb7cf3bac1a42d1703549bb236f60592956 *./Graphics/game/hit_effect/hit_effect_good.png
@@ -4090,8 +4099,9 @@ c475bf01b6ea96c1492c0fe36e288b730e435fd13e08ea4f094d558b9830e35b *./Graphics/glo
 f4e6929412e834eec85242488ef833e8cff6b00e5ccde229c1f2184716fa69a7 *./Graphics/global/rainbow_transition/rainbow_bg_bottom.png
 f46030ebe3247b49b4dfb7ec802812da33572de002989063b3585c2b75bcdbc7 *./Graphics/global/rainbow_transition/rainbow_bg.png
 f86a7ffaafc3038e1b14080c151c5703366a66707d250be9bea9359db6586f81 *./Graphics/global/rainbow_transition/rainbow_bg_top.png
+311b9d56a813d76e2f1885d640f5f497af9c7e58740f55f591150567cca85a9c *./Graphics/global/rainbow_transition/rainbow_glow.png
 e0f89dc98bc3cd5e36fe43afbf3d9ce142f69be881931e0a9733700e0df30628 *./Graphics/global/rainbow_transition/text_bg.png
-88d30f57a386ecd80881e8663a558ff6aba444fc9a08d92c793992b44c574877 *./Graphics/global/rainbow_transition/texture.json
+f48a123f5649930323140601000702a5aae53e0e9399b6fd217e82e4f5b1a33e *./Graphics/global/rainbow_transition/texture.json
 8ba0a29f03932b94c47a5155f7ec96ae605e4195c60dea7df2d5391cf7bb8070 *./Graphics/global/result_transition/1p_shutter.png
 8ba0a29f03932b94c47a5155f7ec96ae605e4195c60dea7df2d5391cf7bb8070 *./Graphics/global/result_transition/2p_shutter.png
 8ba0a29f03932b94c47a5155f7ec96ae605e4195c60dea7df2d5391cf7bb8070 *./Graphics/global/result_transition/4p_shutter.png
@@ -4209,7 +4219,7 @@ d21dc53600bab83b80352bad38cd598d216c6e1279a4d54a0a085ad82ad1430d *./Graphics/res
 684c22481d2a0e4bb2d6dd67b5df87650e081edfeadffcc70c377c393334c06d *./Graphics/result/score/score_shinuchi_en.png
 1c160a1a14016ea3a5f761b040db433420476363224011d615613af660e7d0e1 *./Graphics/result/score/score_shinuchi_ja.png
 89c4d6afafb8010ec4da0b9f72f10f677ec8c87677fcb3d2c9edde923a5b5f9f *./Graphics/result/score/texture.json
-368236cf9d2049a0cfe98de0b823608904beae31b3b2ed2c1521a8c0864c01b7 *./Graphics/skin_config.json
+b7a1f9d973059177df8ea52436086264236a62d3c818f4ed76530c9f555328f7 *./Graphics/skin_config.json
 a05d23f0997446d4db2b745602bff7fc3d2cdce968a1c24e078684d41cf2982c *./Graphics/song_select/animation.json
 b74432db46ec6d7ec080fbee6df6029c1451e243d30813fcf597a21704de4e74 *./Graphics/song_select/box/background/0.png
 c6514d44a9bc8e15e8523c5ede7663be3f7ab34f370ea364263ebf73998d0ab8 *./Graphics/song_select/box/background/1.png
@@ -4237,6 +4247,7 @@ acffeed13a3180a16913c5b8d3ab6ee7b39ede5c81903996ad55620795257722 *./Graphics/son
 62b66b98e1f76c6eb5b9f808917cf59b495019c2da8e42381e42c16e9e2af7dd *./Graphics/song_select/box/bar_genre_back.png
 e140045d5450609e3eb3a950b89a85587db3bdffcd2a0f5bd931f5c8893a60cf *./Graphics/song_select/box/bar_genre_overlay.png
 a3f1743f5bf84c24096fe00a8e80bc1e87325479934bc538e677fb740a606872 *./Graphics/song_select/box/box_chara/0.png
+8bcf5446e8bee1b1e13e7778a875b27771d736b55bc616434e7bc9668f504084 *./Graphics/song_select/box/box_chara/10.png
 652d938ef01b9a7548f4626055e5f51d4d87cf380e8cf8989e410b86586dcd69 *./Graphics/song_select/box/box_chara/1.png
 9cf5b0db1450e5ef30ade0e21ef0a98f69665cf0ef6be74e343372dbcfd580c9 *./Graphics/song_select/box/box_chara/2.png
 1fbc88980a954337b00b08b95aac7e6c7cbef49bb1f8626f10db4e1a60b7cdba *./Graphics/song_select/box/box_chara/3.png
@@ -4585,7 +4596,7 @@ eb2bb15e87cc83d66b320e0e4cbcbd2d5385881f36eca27fe73740439055ef6c *./Scripts/anim
 5789c13c7958010f2878f9a0b119a50af4f362e754dc06ca3683ce742d507d25 *./Scripts/anim/title_idle.lua
 34df97052c186c9588ff6a3c339501318c5e30ab9eecb97d1271c400ab9cfba1 *./Scripts/anim/title_idle_map.lua
 66797bb60d6bacde5d882136a7dee9cda2f3e02282dd2ebaf2ee37346db14f70 *./Scripts/anim/wheel_decide.lua
-c7d27db9d4fcacba0e70d27f1abc8b31c109cb2877c15d93ed71ea850b4825b6 *./Scripts/background/background.lua
+0dc582a0666d3d75d5e7023cad3629f92e97694a96fa89e5bf92568c74c77390 *./Scripts/background/background.lua
 8736233c8c570fb4c1870248b07b616b4cf48528ebe269c9f06f8257edd7c9e3 *./Scripts/background/bg_collabs/a3.lua
 e4ff773b74b780eb310a43053399f33a34b16885627d42c5255bafaf05d53734 *./Scripts/background/bg_collabs/animal.lua
 60c12b294fff74b15c7f54001374434d3f88572129336de622a809130b1fa73d *./Scripts/background/bg_collabs/buttoburst.lua
@@ -4595,7 +4606,7 @@ e514657c28c18d6b913e24b416694cd9e0dc4f61d229b42e423ea62ac5ff69a3 *./Scripts/back
 d6a27cd79db76d7cdb3fcf70134fadae0679e728f2b2bd615ce4b8c465b44c28 *./Scripts/background/bg_collabs/imas_sidem.lua
 faf1051b2de0e879b03bf27ceb4241b7536f92571ce8ed828c318089895fda35 *./Scripts/background/bg_collabs/oshiri.lua
 ea6d17fba190ecd605106d9b12e6fa79311ee637a00c0345f9c425f4286c1b27 *./Scripts/background/bg_collabs/practice.lua
-db1861b6bd344a022b11e1865104ae76b762e8c8b81cfc7b424c3ab6d2584e47 *./Scripts/background/bg_collabs/tutorial.lua
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 08d45ec56e2c7fd5e0842d3fda7997c843ac1a1971a3d41255d618799899a508 *./Scripts/background/bg_data/bg_anim/b_001_dai.lua
 e2f18975cf78f3de351f8459be4c4f6b7b6db54f5efd4589991672c7daf1fa6d *./Scripts/background/bg_data/bg_anim/b_001_f.lua
 f3b7b0c83c369de1e7cf81aed87354e282819324f12340b612661abbed455d45 *./Scripts/background/bg_data/bg_anim/b_001_n.lua
@@ -4701,6 +4712,7 @@ f0691b7a6fe1596b81f116c01ce11e556d599729905e380d1c98b3f5cf76d833 *./Scripts/back
 f1abac2a469adf39ab62d4155279502382138c293159a7c89974dddba626af3c *./Scripts/background/bg_data/renda_anim/b_014.lua
 067705d55473ade03acf4f47ecc4769bea60e372b12e66daabee74f0a634a2b5 *./Scripts/background/bg_data/renda_anim/b_019.lua
 09713d7b67e8100d57b19de6b4d914b6f8f565badd9ae17b7285360c8a4e708c *./Scripts/background/bg_data/renda_anim/b_020.lua
+393113431aefde1f2ca5c580295cd15fc744fb8190c0b28ffce57379889616db *./Scripts/background/bg_data/tutorial_ac.lua
 9673322142f4e11eb092e047830c56e9a9ec3e64dae8e0e1e0393c11b3b40ef1 *./Scripts/background/bg_objects/arcade_gauge.lua
 62a45059c20d22137bffb6f9f72882a56c14ef0dec4e295098cfb6ccc047697d *./Scripts/background/bg_objects/bg_anim.lua
 fb9ec8d460861278976befcf2d8f523d4068cdfd1fafd9adce9ab4bc0b5816ff *./Scripts/background/bg_objects/bg_fever.lua
@@ -4791,7 +4803,7 @@ de52279393c43fd2b1f880919597ae6d8802174e0ab6d0db06126b2b090a77b9 *./Scripts/glob
 92c9865f21ff18185b60011f12bd97d30fa0a4c3145b4f71347e68ccb5e24a87 *./Scripts/global/network_msg.lua
 34645d4c05dcb582ddaad6e3d2e1075c476471c81e0ce68e33f7b0bbfa3c0f2b *./Scripts/global/result_transition.lua
 1eb98ab1463795c77e2f80aa49eaa1aa73e2e4509b739f00ac53d07cbf40fed7 *./Scripts/global/timer.lua
-e0841261cc4dc5bd22c42392708819e9c8d3e25ef1a153d5b7fcae1328347d55 *./Scripts/global/transition.lua
+a116d115e2330ed953ef7d5dd3d32ad8f17f969a891a2ed5aa0b6f124c0f9281 *./Scripts/global/transition.lua
 b458c0c88c2544c93f1402b7506e51c0ca47b67aee2573e130d57c20079c7260 *./Scripts/result/bottom_characters.lua
 63056cb46b73fcdfcbfb0b51b3afedc3131913935705c6c5d15655db83dde850 *./Scripts/result/dan_result_draw.lua
 5100bbdacb2464227ad50262c5c9daf56ca4ca17dc0aa121fd64bc72946dab8a *./Scripts/result/high_score_indicator.lua
@@ -4806,13 +4818,14 @@ dcc7b7d655cf5d2ea0fc95764bacf7f08f40a35942f8fd5329303a2c11589a3c *./Scripts/resu
 49d6b0e063c3afbeb304a1f60d228c2bf7229d4604f08f50ba1382049259592e *./Scripts/song_select/file_navigator/box_back.lua
 47b10e73852684884a19efecce94fbfd066b90bedbe4251495da3f1759d0abb4 *./Scripts/song_select/file_navigator/box_base.lua
 6bf1a5c3117ae2cdb62add55f1848ffef0b5f3969ae4ea3aa4bd708039c0bf9a *./Scripts/song_select/file_navigator/box_dan.lua
-26d5bcde2e33a29d2d88728cdcccd13ec299f235e1cfb759d9d109e4a0a7678b *./Scripts/song_select/file_navigator/box_folder.lua
+efcfa8c68806bd443c8e64209c77f0af558d2e2956b141b780019171c66441af *./Scripts/song_select/file_navigator/box_folder.lua
 db062d44c9b1b15e66f23c525bd2bc68262c0b4db11a2dc9532bf99a721fd848 *./Scripts/song_select/file_navigator/box_song.lua
 6df8f4fc78403635889409829d681dae340df45423f019d717d4d8c72aa39c2b *./Scripts/song_select/modifier.lua
 e7867c13a618c6f970eaee2826ac6d0efb5539f8b13488dfe5d1c2ece5a81b49 *./Scripts/song_select/option_panel.lua
 8f1459f85bed2ff0bf2919a9928955dc07f5cfe574215d01672d6ecdb2779dbf *./Scripts/song_select/score_history.lua
 ff4a21f751fee4ea71232f810e4082ead1dedec5ab0f08862a6804ef0685aec2 *./Scripts/song_select/selector.lua
 77493aea918df535a9d547dafb764b59152da782ee60ce1f87f88bd1c6e46f9c *./Scripts/song_select/song_select.lua
+9887ca85f8aa0725ccb55aa6feb38430dd64fda49d0fe59059ee3ec17fdb1553 *./Scripts/song_select/ura_switch.lua
 a80bb097985d39c80ce07e2121d060648ebbfad0fae62ffacdb69a0180c9c954 *./Scripts/title/attract_camera.lua
 508cce139869b7a9604c6db483faedb2bbb57d8b127dbeacefff8f0320dc4233 *./Scripts/title/attract_scene.lua
 6f39ec09eb0b0658e89ac114c7af2fb916f89ca6df558417388dabd28cb5a7e2 *./Scripts/title/warning_screen.lua
@@ -4971,6 +4984,22 @@ eb0dfe8ada1ec4bba8a909c2aa0085da80ad8e5831e7d3d589d4bd4d741e3da4 *./Sounds/game/
 3ee28e6cfe4ae5892f69ed1b930c5eaeea694d82141f334af39c8277b80d349c *./Sounds/game_over/voice.ogg
 e8582eb135c41d10c8fb4dffe4f8683903572b0d5f36b3d3d1ebc53d444af08c *./Sounds/game/restart.ogg
 7b6db0bc1bcd900635a721983f9d1d4a3708a7c94dc84f92e9395468b14a7a64 *./Sounds/game/result_transition.ogg
+7a438cb70361275daed4356d23a504ab38d4ac105bf09bd8c1db0e0577dce775 *./Sounds/game/tutorial/balloon.ogg
+a8c29f3995ecd5b17d0c2fa15f3109d5bae9b9a6c1dbeecf68fa3503beafd94e *./Sounds/game/tutorial/bgm.ogg
+394eb2c302cc05b99c5f429d6577f766e70bd0dc5b8d3e42cdfbe5b09cc43adf *./Sounds/game/tutorial/burn.ogg
+7e9aa96b627d633b4d4fc6c82895154626e6a887389c9996cf794967ea3c33d3 *./Sounds/game/tutorial/clear.ogg
+feb85dd227f4163a0d52aff2c24055b05180a12e21b131a67672dbed5242f4a1 *./Sounds/game/tutorial/sidebody.ogg
+8b8c89e385b77e63c47526a80c8ddb49d189dadf37cedbaeb04149134e7184d0 *./Sounds/game/tutorial/voice_10.ogg
+03944a76a6df43a6884de10de3600befd1e1681d2190cde9f2b1db1fa808f0c3 *./Sounds/game/tutorial/voice_11.ogg
+985cead13844bee272d8ca4fa553c71e8a9ea71bf96cb5ed00521767ff5916a9 *./Sounds/game/tutorial/voice_1.ogg
+833e6631c8d0eed92b70dbc72d7b5ad4ac17cd23a32177043709e4a48e0f29b0 *./Sounds/game/tutorial/voice_2.ogg
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 c66a5e6382037116e6eb1151d1d5eafd0a166197870a7e50fd29c48769cc7e43 *./Sounds/global/voice_timer_10.ogg
 621e9b740b7059df59959a721ef93992e55487dee5534f85af1fed4af0ee1a0d *./Sounds/global/voice_timer_30.ogg
Author	SHA1	Message	Date
TaikoZhongandClaude Opus 5.5	9ab9c3d395	Notes: drumroll and balloon tails start at their first column An empty column at the joint was filtered into a thin dark line on the drumroll body. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2026-11-07 20:14:41 +08:00
TaikoZhongandClaude Opus 5.5	6e297895d2	Notes: arcade note and label sprites Same 1080p cell layout, so texture.json is unchanged. The empty pixels are kept black so no light fringe shows at the dark outlines. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2026-11-07 01:01:15 +08:00
Yonokid	86d2066d6f	Merge pull request 'Big-note judgment rings and rays' (#86 ) from GanYiZhong/YataiDONNijiiro:feat/big-note-rays into main Reviewed-on: Yonokid/YataiDONNijiiro#86	2026-11-06 17:52:46 +01:00
TaikoZhongandClaude Opus 5.5	62d9444d90	Big-note judgment rings and rays Hitting a big note now draws the outer ring flipbook and the ray rings (engine animation ids 68-74 with hit_effect/outer_effect_good and outer_effect_ok at the big outer ring's spot). The ids 68, 70 and 71 held animations nothing used any more; they now hold the big-judgment ones. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2026-11-07 00:46:12 +08:00
Yonokid	6026caf4cb	disable new features	2026-11-04 19:53:47 -05:00
TaikoZhongandClaude Opus 5.5	9a754e23d8	Update checksums.sha256 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2026-11-03 03:44:32 +08:00
GanYiZhong	09da9166b9	Merge pull request 'Background: require a collab's script the first time a song uses it' (#85 ) from GanYiZhong/YataiDONNijiiro:perf/lazy-collab-backgrounds into main	2026-11-02 20:44:00 +01:00
TaikoZhongandClaude Opus 5.5	8ffea9a18e	Background: require a collab's script the first time a song uses it Requiring all 37 when background.lua loaded took 250-300 ms of the first game load. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2026-11-03 03:43:05 +08:00
Yonokid	8e82171e28	Update checksums.sha256	2026-11-02 08:35:57 -05:00
TaikoZhong	b9101960de	Update checksums.sha256	2026-11-02 15:46:15 +08:00
GanYiZhong	bbd6724c27	Merge pull request 'Song select: no parent ura switch overlay' (#84 ) from GanYiZhong/YataiDONNijiiro:fix/no-green-ura-switch into main	2026-11-02 08:45:53 +01:00
TaikoZhongandClaude Opus 5.5	1fc1fe5b54	Song select: no parent ura switch overlay The blank ura_switch frames were removed (`f37375e`), so the engine's ura switch overlay fell back to the parent skin's art over the difficulty board. Nijiiro plays its own oni/ura change on the board, so the overlay now draws nothing. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2026-11-02 15:45:22 +08:00
TaikoZhong	4828bb777a	Update checksums.sha256	2026-11-02 14:43:02 +08:00
GanYiZhong	9d365f7ceb	Merge pull request 'Tutorial: crisp wave rows' (#83 ) from GanYiZhong/YataiDONNijiiro:fix/tutorial-wave-crisp into main	2026-11-02 07:42:44 +01:00
TaikoZhongandClaude Opus 5.5	68e07f3c22	Tutorial: crisp wave rows - Pixels tinted by the green filler take the nearest clean pixel's colour and keep their own coverage (the neighbourhood average smeared the joints) - The background layers are drawn at whole pixels: between pixels, filtering softened them and darkened their edges Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2026-11-02 14:42:02 +08:00
TaikoZhong	4acb5411c7	Update checksums.sha256	2026-11-02 14:22:58 +08:00
GanYiZhong	b8dcef4fe0	Merge pull request 'Tutorial: fill the wave rows' joints' (#82 ) from GanYiZhong/YataiDONNijiiro:fix/tutorial-wave-joints into main	2026-11-02 07:22:37 +01:00
TaikoZhongandClaude Opus 5.5	32aa418dc5	Tutorial: fill the wave rows' joints The green filler pixels were cut out, leaving small holes where the fans meet; they are now repainted from the neighbouring colours. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2026-11-02 14:22:00 +08:00
TaikoZhong	8d7218769e	Update checksums.sha256	2026-11-02 13:33:37 +08:00
GanYiZhong	be5df5662c	Merge pull request 'Song select: a howto board for the tutorial folder' (#81 ) from GanYiZhong/YataiDONNijiiro:feat/howto-box into main	2026-11-02 06:33:02 +01:00
GanYiZhong	cd577573ba	Merge pull request 'Tutorial: Chinese captions, narration, background and sounds' (#80 ) from GanYiZhong/YataiDONNijiiro:feat/tutorial into main	2026-11-02 06:32:51 +01:00
TaikoZhongandClaude Opus 5.5	ef06a424e4	Song select: a howto board for the tutorial folder The tutorial folder (GENRE:TUTORIAL) uses the recent board's colours with its own characters (box_chara frame 10). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2026-11-02 13:31:14 +08:00
TaikoZhongandClaude Opus 5.5	e3e2ef9903	Tutorial: Chinese captions, narration, background and sounds - Japanese narration in scene order, Chinese (zh) captions, skip and clear text - New tutorial background: pattern, mountains, clouds and four wave rows on their own scroll/bob timelines, still floor - Tutorial music and sound effects (side hit, balloon, clear, burn) Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2026-11-02 13:30:48 +08:00
TaikoZhongandClaude Opus 5.5	5edb380f2a	Update checksums.sha256 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2026-11-02 10:11:05 +08:00
GanYiZhong	eed50218de	Merge pull request 'GOGO fireworks: arcade placement and fan-out' (#79 ) from GanYiZhong/YataiDONNijiiro:fix/gogo-explosion into main	2026-11-02 03:10:44 +01:00
TaikoZhongandClaude Opus 5.5	bcb986f401	GOGO fireworks: arcade placement and fan-out The six gogo_time/explosion fountains used the arcade's splash positions as absolute screen coordinates. Those positions are relative to the lane (+276), so the fountains stood 657 px too high and covered the lane. They are now centred where the arcade puts them, rising from the bottom of the screen, and game_gogo_explosion_tilt fans them out by the arcade's angles (+-5.89 / +-11.78 deg, the outer pairs mirrored). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2026-11-02 10:08:11 +08:00
TaikoZhongandClaude Opus 5.5	20dc837442	Update checksums.sha256 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2026-11-02 09:46:11 +08:00
GanYiZhong	930160395a	Merge pull request 'Loading transition: glow without additive blend, curtains open on the game' (#78 ) from GanYiZhong/YataiDONNijiiro:fix/loading-transition into main	2026-11-02 02:45:36 +01:00