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Showing results for tags 'volume matte'.
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According to the houdini documention: http://www.sidefx.com/docs/houdini/nodes/obj/geo [www.sidefx.com] For correct matte shading of volumes: Add the vm_matteshader property to the object. Create a Volume Matte shader. Set the density on this shader to match the density on the geometry shader. Assign this shader to vm_matteshader. Does any one have an example of a volume matte shader? I want to hold out particle renders with a volume hold out matte. i.e. where the density of the volume = 1, the particles are not visible in RGB and A. Where the density of the volume = 0, the particles are visible in RGB and A. And the particles are correspondingly partially visible for all values between 0 and 1. I'm trying to make particles partially visible behind a translucent object. Any pointers would be much appreciated. thanks
