Imagine a pop'n default noteskin.

.gitignore

@@ -3,6 +3,8 @@
 .vscode
 .vs
 .idea
+*.kdev4
+/.kdev4
 /[Bb]uild
 /out/
 

NoteSkins/popn/default/Key Receptor.lua

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+-- the funniest move around.
+local button = Var "Button"
+
+-- making sure the player isn't on downscroll
+-- then doing a flip.
+local flip = GAMESTATE:GetPlayerState(PLAYER_1):GetCurrentPlayerOptions():Reverse() == 1
+
+local t = Def.ActorFrame {
+	Def.Sprite {
+		Texture = "_receptor",
+		Frame0000 = 0,
+		Delay0000 = 1,
+		InitCommand = function(self)
+			-- i love scaling textures
+			self:diffuse(color(colors[button])):zoomx(0.5)
+			if not flip then
+				self:rotationx(180)
+			end
+		end
+	},
+	Def.Sprite {
+		Texture = "_flash",
+		Frame0000 = 0,
+		Delay0000 = 1,
+		InitCommand = function(self)
+			self:diffuse(color(colors[button])):diffusealpha(0):zoomx(0.5)
+			if not flip then
+				self:rotationx(180)
+			end
+		end,
+		PressCommand = function(self)
+			self:diffusealpha(0.25)
+		end,
+		LiftCommand = function(self)
+			self:accelerate(0.25):diffusealpha(0)
+		end
+	}
+}
+return t

NoteSkins/popn/default/Key Tap Explosion Bright.redir

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+_blank

NoteSkins/popn/default/Key Tap Explosion Dim.redir

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+Key Tap Explosion Bright

NoteSkins/popn/default/Key Tap Lift.lua

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+local t = Def.ActorFrame {
+	Def.Sprite {
+		Texture = NOTESKIN:GetPath("", "lift")
+
+		Frame0000 = 0,
+		Delay0000 = 1,
+
+		InitCommand = function(self)
+			self:zoomx(0.5)
+		end
+	}
+}
+
+return t

NoteSkins/popn/default/Key Tap Note.lua

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+-- i keep telling myself this is the funniest thing i've seen.
+local button = Var "Button"
+
+local t = Def.ActorFrame {
+	Def.Sprite {
+		-- because there's not really a point of putting snaps on it,
+		-- if you actually want it to have snaps, use 0.74.0+ or
+		-- contact me.
+		Texture = "_bar",
+		Frame0000 = 0,
+		Delay0000 = 1,
+
+		InitCommand = function(self)
+			-- have to zoom these by a half because notefield is a fcuk.
+			self:diffuse(color(colors[button])):zoomx(0.5)
+		end
+	},
+}
+return t

NoteSkins/popn/default/NoteSkin.lua

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+local ret = ... or {}
+
+-- doing a global color move so i can just not repeat these lines of code,
+-- which is probably dumb but i'll take responsibility for it.
+colors = {
+	["Left White"] = "#ffffff",
+	["Left Yellow"] = "#ffff00",
+	["Left Green"] = "#00ff00",
+	["Left Blue"] = "#0000ff",
+	["Red"] = "#ff0000",
+	["Right Blue"] = "#0000ff",
+	["Right Green"] = "#00ff00",
+	["Right Yellow"] = "#ffff00",
+	["Right White"] = "#ffffff",
+}
+
+-- i am not gonna make separate textures for these, feel free to make some if you want to not do this.
+ret.RedirTable = {
+	["Left White"] = "Key",
+	["Left Yellow"] = "Key",
+	["Left Green"] = "Key",
+	["Left Blue"] = "Key",
+	["Red"] = "Key",
+	["Right Blue"] = "Key",
+	["Right Green"] = "Key",
+	["Right Yellow"] = "Key",
+	["Right White"] = "Key",
+}
+
+local OldRedir = ret.Redir
+
+ret.Redir = function(sButton, sElement)
+	sButton, sElement = OldRedir(sButton, sElement)
+
+	--Point the head files back to the tap note
+	if string.find(sElement, "Head") or sElement == "Tap Fake" then
+		sElement = "Tap Note"
+	end
+
+	sButton = ret.RedirTable[sButton]
+
+	return sButton, sElement
+end
+
+local OldFunc = ret.Load
+function ret.Load()
+	local t = OldFunc()
+
+	-- The main "Explosion" part just loads other actors; don't rotate
+	-- it.  The "Hold Explosion" part should not be rotated.
+	if Var "Element" == "Explosion" or Var "Element" == "Roll Explosion" then
+		t.BaseRotationZ = nil
+	end
+	return t
+end
+
+-- where did ret.PartsToRotate go, to the dance store?
+-- anyways you will not need it.
+
+ret.Blank = {
+	["Hold Explosion"] = true,
+	["Roll Explosion"] = true,
+	["Hold Topcap Active"] = true,
+	["Hold Topcap Inactive"] = true,
+	["Roll Topcap Active"] = true,
+	["Roll Topcap Inactive"] = true,
+	["Hold Tail Active"] = true,
+	["Hold Tail Inactive"] = true,
+	["Roll Tail Active"] = true,
+	["Roll Tail Inactive"] = true
+}
+
+return ret

NoteSkins/popn/default/README.txt

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+Deco - sonicjoplus
+
+This skin is made so people can finally get to experience pop'n with a (mildly decent) skin.
+Do whatever you will with this.

NoteSkins/popn/default/metrics.ini

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+[Global]
+FallbackNoteSkin=common
+
+[NoteDisplay]
+TapNoteAnimationIsVivid=0
+DrawHoldHeadForTapsOnSameRow=1
+TapNoteAnimationLength=1 // none of these matter because Lua is handling the animation, not sprites.
+TapAdditionAnimationLength=1
+TapMineAnimationLength=1
+TapLiftAnimationLength=1
+TapFakeAnimationLength=1
+HoldHeadAnimationLength=1
+HoldTopCapAnimationLength=1
+HoldBottomCapAnimationLength=1
+HoldBodyAnimationLength=1
+HoldTailAnimationLength=1
+
+StartDrawingHoldBodyOffsetFromHead=0
+StopDrawingHoldBodyOffsetFromTail=0
+
+HoldLetGoGrayPercent=.25
+
+HoldHeadIsAboveWavyParts=1
+HoldTailIsAboveWavyParts=1
+
+ReverseDrawOrder=111111111
+FlipHeadAndTailWhenReverse=1
+FlipHoldBodyWhenReverse=1
+
+TapNoteAdditionTextureCoordOffsetX=0
+TapNoteAdditionTextureCoordOffsetY=0
+TapNoteNoteColorTextureCoordSpacingX=0
+TapNoteNoteColorTextureCoordSpacingY=0
+TapFakeNoteColorTextureCoordSpacingX=0
+TapFakeNoteColorTextureCoordSpacingY=0
+HoldHeadNoteColorTextureCoordSpacingX=0
+HoldHeadNoteColorTextureCoordSpacingY=0
+
+TapFakeNoteOpacityMultiplier=0.25