Procedural Volume Shader

[gustav]

Hi.

I want to create a procedural cloud inside a volume.

My idea is to use a function something like this:

if( (voxelPosition + noise(voxelPosition)) < 0.5 )

density = 1;

else

density = 0;

I figure I want create a Volume SOP that a connect to a Volume VOP, but I can't get it to work. Is this the right way of doing it?

Thanks!

Edited November 20, 2009 by gustav

[Peter Quint]

Take a look at an isosurface node (with volume generation enabled - it generates surfaces by default). The variables $X, $Y, $Z are your voxel position.

Hi.

I want to create a procedural cloud inside a volume.

My idea is to use a function something like this:

if( (voxelPosition + noise(voxelPosition)) < 0.5 )

density = 1;

else

density = 0;

I figure I want create a Volume SOP that a connect to a Volume VOP, but I can't get it to work. Is this the right way of doing it?

Thanks!

[gustav]

Thanks Peter, works great! I also found your video tutorials on volumes on vimeo, exelent resource on houdini. Thanks again.

Take a look at an isosurface node (with volume generation enabled - it generates surfaces by default). The variables $X, $Y, $Z are your voxel position.

Edited November 21, 2009 by gustav