Realflow Foam- Krakatoa

[anon66981136]

Hello everyone, here is a quick question,
I simulated one water simulation using standard particles and computed the vorticity data for the foam which i will use to render the foam using krakatoa.
I followed this tutorial ( vimeo.com/10100296 )for to cache vorticity channel and my particles are represent as white areas are the foam and black areas are not foam,so in comp,black areas will disappear.
My question is i use environment reflection maps to give the foam more natural look,but i only want to reflect my white particles but black particles also have a reflection and there is no foam on those areas,there is anyway to workaround for this,like density map,white areas reflect and black areas doesn’t reflect ?

Thank you all ,

Best.

[Bobo]

One way to do this would be to “kill” the normals to [0,0,0] - particles with a Normal of [0,0,0] do not see the reflection map.

In the example below, I added a Volume Select to the middle of the cloud to create a Selection channel and used a KCM to set the Normals to 0 where the Selection is greater than 0.0.
In your case, you could use the Vorticity and have a threshold above which reflections are turned on. Unfortunately, this is a binary On/Off, not a gradual blending from 0 to 1.

[anon66981136]

Thank you very much Bobo,i 'll check it out and let you know soon ,

Best.