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Re: Volumetric Shader Help


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Its been a while since I posted here at odforce, and I am hoping the shading gurus here can proivde me some pointers on volumetric shading.

I have managed to write out a density data from maya fluids and use it in my shadeop. Problem I am struggling to get a good self shadowing volumetric look.

here are two images of the shader and it is quite obvious it isnt taking the shadow into consideration in the illuminance loop: but as long as I have an illuminance loop I am thinking the shadow must be calculated.

fluidShadow.jpg

fluidNoShadow.jpg

Another problem I am having is mixing the density information from maya with procedural noise.

If anyone here can please shed some light it would really help me.

oh btw heres an animation...

http://www.serrao3d.com/TestMovs/fluidTestA.mov

As of now I am taking code from the advanced renderman book about volumetric shaders.

Thanks in advance

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