3DS Max 2018 Fluids: Foam with Vray

[Anonymous]

I have been experimenting with the new Fluids Feature in 3DS Max 2018, and I am trying to see if it could potentially be used instead of Pheonix for some situations. I am trying to emulate the results in the Lighthouse screenshot in the Foam help page: http://help.autodesk.com/view/3DSMAX/2018/ENU/?guid=GUID-0B499D9B-DAB8-478C-8988-018F6E97F1D4 

In my studio we use exclusively Vray, and with Vray I only seem to have access to placeholder objects in Simulation View>Render Settings>Foam Settings. I am able to render Arnold Surface using the Arnold renderer, which yields results similar to the example with motion blur and particle effects. However when I try to render using Vray, Foam does not render. 

1)Are there are any recommended options/settings to render Foam for those using Vray?

2) Is there any way to differentiate materials between foam and fluid as shown in the example?

3)Are there any other known conflicts with Fluids and Vray?

Here are a couple examples of my attempts. I'm using a Motion Field on a Container emitter. Thanks in advance 🙂

Vray Renderer, Foam Render As: Sphere

Arnold Renderer, Foam Render As: Arnold Surface

Vray Renderer, Foam Render As: Arnold Surface (blank)

[Chri688m]

I think you should go to the vray forum at chaos group instead, since this is about the renderer and not really 3ds max if i understand correctly.. 🙂

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[-niels-]

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@leahHF44S wrote:

2) Is there any way to differentiate materials between foam and fluid as shown in the example?

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I don't know anything about Vray, but i have found that Foam has Material ID: 2 so using a "multi/sub-object" you can define another material to Foam.

Hope that at least helps with that.

[chris_img · Accepted solution]

Multi-sub works well.  1= liquid, 2=foam.

RE motion blur - I have asked on the chaos group forum, but nothing yet, which does lend me to think motion blur doesn't work with vray (for know).  Realistically, why would chaos group put resources into this when they are selling a rival (in some respects) plugin.

[Anonymous]

Thanks for your replies, that does help me understand the issue better! It makes sense that Max is trying to encourage users to use it's native renderer and there's nothing wrong with that. Motion blur does work in Vray, unless you're talking about using it with Fluids? whether it's possible to emulate those same foam results I guess will need some experimenting. I will give the multi-sub material a try too. 

Fluids is a cool tool and I hope to be able to use it, since relying on 3rd party plugins for network rendering can be annoying since every node has to have a license as well.