Transfering data calculated in fragment() to light()

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1

Godot Version

4.6

Question

I have recently implemented an edge detection spatial shader and now wanted to change the shading logic for pixels on edges a bit in the light function. The problem I have encountered is the following: How do I best transfer the info that a pixel is an edge from the fragment function, where the edge detection is calculated, to the light function?

Currently I am just hijacking the roughness built-in, since I am currently not using it, but I might want to in the future. Is it really necessary to put the information about if a pixel is an edge in a texture first to then read it later in the lighting calculations for something so simple, or is there a better way?

2

Use a varying.

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