Shader works in scene space, but not screen-space canvas

Unity Engine
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1

I’m making a 2D game in Unity (2021.3.14f1). I’m using the Built-In Render Pipeline. I have this simple palette swap shader that works on anything in scene space (Sprite Renderers, Image/Text objects on world-space or camera-space canvases), but when I try to use it on an Image or Text object on a screen-space canvas, it just makes the object invisible.

I can’t just switch to a camera-space canvas, because this is for some UI stuff that uses UI masks, and UI masks don’t seem to work unless the canvas is in screen space.

I’m sure there’s a simple fix for this issue, but I can’t figure out what that might be. Any suggestions?

8703078–1174965–paletteSwap.shader (2.57 KB)

2

Hi! This is probably cause by ZTest mode us different in UI.
You can try to add this line code in your shader’s pass and check it work?

ZTest [unity_GUIZTestMode]
3

That did the trick! Thanks.