Making foam bubbles brighter

[lorenzo_spinola]

Hi everyone,
I'd need some help to havemore control on the foam bubbles from Phoenix fd.

During the GI calculation they look fine and bright as I'd like to have, but inthe final render when completed they look dull....

I know in vray gpu there are limitations and only bubbles are supported for the moment, so I thought I could make some adjustemnt in post production.

My initial idea was to render only the bubbles, so making the render twice and hoping it was faster than the whole scene, but I don't know how to render only the bubbles....
I read around that to have foam/spalsh/mist on the same element it's enough to activate the atmosphere element.
I tried it but the pass it's always total black.

Could anyone guide to render the in the correct way please?
Thanks in advance,
Lorenzo

[georgi.zhekov]

Hey,

The Atmosphere render element is still not implemented for Phoenix on V-Ray GPU. What you can do instead is to use the MultiMatte render element. This will give you a colored mask that you can use in Post to adjust only the foam/splashes.

In order to make it work, just turn on the Render as Geometry checkbox in the Particle Shader settings (if you have more than one Particle Shader in the scene you will have to turn it on for every one).
Then with the Particle Shader selected, right-click and go to the Object Properties menu. From there set the Object ID to 1,2 or 3 (these correspond to the IDs in the Multimatte render element settings).

Hope this helps

[lorenzo_spinola]

Hi Georgi,
sorry for the lat reply,
thanks for the tip you shared, I'm gonna try it straight away

Lorenzo