Volume Masking

[dhanad]

Is it possible to use a mask to blend between the volume shader and the surface shader that is applied to same mesh? So the geometry has a aiStandardSurface applied, as well as aiStandardVolume, I would like to use a mask to have only masked areas blending into volume and not the entire mesh.

[Anonymous]

You can use StateVector (as Po variable ) with RampFloat as a mask in MixShader

[dhanad]

I would plug that in to the Mix slot. and have the 2 shaders (volume and standard surface) in the two shader 1 n 2 slots?

[Anonymous]

something like this, but you have to change the input from Y to z or X as needed

[dhanad]

Thanks rachid, I tried doing that. Maybe I am doing something wrong. It appears once set the step size in volume attributes for the mesh, the geometry renders complete as volume, and if dont use aiStateVector and RampFloat nodes, and just simply use the mix slider, the surface shader renders invisible.

[Anonymous]

Here is a simple test scene: 90.1MB
https://wsi.li/dl/t4v4q9PLonCRgo7nm/274e6a

[dhanad]

Thanks rachid. I will download and check your test scene out. I am pretty sure I am doing something wrong. I will report back!