Originally Posted By: Kartoffel
It's basically adding
Code:
Color *= dot(vViewPixelDir, vNormal);
to a shader.

A tiny bit more if you want to adjust the intensity and prevent issues with negative results.
But that dot-product is the idea behind the whole thing.
I'll be happy to give it a try. But how and where in a shader do I declare 'vViewPixelDir' and 'vNormal'?

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