Rendering Foam in C4DtoA

[Francis_Bievre]

Hi guys,

So I made a houdini simulation of a whale jumping out of the water. I imported the sim into C4D and made a test render with C4DtoA.

Here you can see the video.

The problem is that my foam seems off, I can spot the particles too much, they are all the same size and opacity. Is there a way to tell Arnold to render the particles with an opacity based on the particles density or something like that ?

Plus, do you know if there is a way to randomize the size of the particles ? (but I'm guessing I'm off topic here, as it must be a thinking particles topic and not an arnold TP one ?)

Thank you for your help.

Francis

[peter.horvath6V6K3]

So the particles are imported as Thinking Particles, right? If they contain the density channel, then you can export it to Arnold and read it via a user_data shader. This documentation might help.

Arnold works with the size coming from the DCC, so randomizing is really a Thinking Particles topic. I think it should be possible via Xpresso, but I'm not an expert.

[Francis_Bievre]

Thank you Peter. I did not achieve the result I was looking for, but some other time maybe !

[Anonymous]

you can easily randomize the size of particle by hooking up a pSize node in thinking particles to your particle group. Check out the attached image. Not sure about the density question.

[Francis_Bievre]

Thank you Garret !