Rendering water spray particles

[Jordan Walsh]

So im doing some splashy water sims and have generated a few million splash particle as the spray/foam.

Whats a good shader setup for this. I kinda want a volume look with self shadowing through it as the splash will be a bit back lit. Im rendering in PBR with a HDRI environment light as I am getting a good surface render for the water from using the mantra surface renderer.

I had a look at PQ's "millions of particles" video where he uses the isotropic lighting model but im not getting the best results with that.

Any other hints?

Thanks!

[woodenduck]

It sounds like you should take a look at this - http://www.sidefx.com/index.php?option=com_content&task=view&id=2179&Itemid=132

Scott uses a fairly straightforward setup with a volume cloud shader, which produces some descent results.

[Jordan Walsh]

It sounds like you should take a look at this - http://www.sidefx.co...2179&Itemid=132

Scott uses a fairly straightforward setup with a volume cloud shader, which produces some descent results.

Ahhh, yes, I forgot to look at that one!

Thanks!

So I have built the shader as per the video.

How can I add extra vex Variables to the shader to export to AOVs?

I was exporting a different colour per shader for matting and aso the v for velocity.

I tried adding a vex builder node with the same parameter nodes ans my normal mantra shader had but they arent appearing in my AOVs