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How to blend volumes?

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olivierth
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Hi!

I made a noised volume using a volume wrangle. I duplicated that wrangle and change the settings to get a different noise. How can I blend both volumes? I tried using a volume vop but it looks like the density can only be picked from input 0.

-Olivier

EDIT: I see there's a VolumeMix sop I can set to blend but I don't get how to mask it. Lets say I wanted the top portion of the volume to be A and the bottom to be B with a gradual transition?
Edited by olivierth - July 3, 2019 16:12:29
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tamte
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float y = relbbox(0, @P).y;
float mask = chramp("falloff", y);
float d0 = f@density;
float d1 = volumesample(1, 0, @P);
f@density = lerp(d0, d1, mask);
Tomas Slancik
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Framestore, NY
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olivierth
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Ah! volumesample is what I was looking for!

Thanks tamte!
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