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Snow Volume Shading

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Hello guys,

I try to shade a snow simulation by rasterizing the points to a volume and use the pyro shader to shade it. I'm pretty happy with the result but I want to add some random brightness (to get some voxels reflecting light a lot and some not) to get a better look of the snow, but I don't know how to do this. If anyone has an idea or know where to start, I'll be glad to hear you !

I already tried to use a noise in the volume to use, but it's really really heavy and long to compute. I also tried to transfer brightness from random points but it didn't work at all, maybe I was doing it the wrong way.



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