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Is there a way to get full-screen clickthrough transparency without having to use mouse_passthrough_polygon in #Godot 4? Yes! Through the magic of Window's chromakey styling and a color shader that bumps any pure black pixels out of the chromakey's range, we can do exactly that!

A neat bonus to this setup is pure-black textures that are in a CanvasLayer above the shader act as a mask to anything in the layers below it!

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