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Mon Sep 14, 2015 1:50 pm
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Last edited by Theodor Groeneboom on Fri Jan 26, 2018 8:09 pm, edited 3 times in total.
That's because the particles don't have any context for the textures applied to them. They have UV's (which are referenced from a source shape and can't be changed without a plugin or something like Replicate3D) and vertex colors (which is what you are changing with pCustom). Since your pEmitter has uniform (1,1,1,1) for the vertex colors, modifying them in the pCustom doesn't seem to do anything. Try randomizing the particle color under the Style tab and you'd get something happening in pCustom.
What you would actually want is an fCustom (fragment) which would operate on the material applied to the particles.
If you're interested in something like that, there may be a solution to that available in the very near future (but only for Studio).