Arnold for Houdini Forum
Rendering with Arnold in Houdini and Solaris using the HtoA plug-in.
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Writing ASS for crowd

Message 1 of 4
325 Views, 3 Replies

Writing ASS for crowd


I'm trying to find a workflow for crowd rendering with Arnold/Houdini
(I'm using Arnold HtoA (arnold on Houdini 19.5.493)

But it gives me headacke !

The agent system of houdini is a special packed primitives.
When I run a simulation and try to save the caches to .ass file, all the meshes of ALL the agents are writting inside the .ass file.

Is there a way or any tricks to keep instances with a crowd setup into an arnold procedural ?

I need to render very massive crowds with HD agents, and that's impossible if it's unpacked geometry. Houdini crashes due to ram issue.


Thanks for help, I can't find solved topic about that !

Tags (3)
Message 2 of 4
in reply to: CyrilCosta

I am also having the same problem.
Have you found a solution here since then?

Message 3 of 4
in reply to: kimuayum

Yes, I ran into usd / solaris.

The cache files go from 30go per frame to 800Mo. But it was a pretty massive workflow, lot of RND and dev to create all proper render settings, aovs, etc.

I spent month on it.


But you can stay in /obj/ and try splitting your crowd into different parts, use LODs and camera frustrum, try to use same models with different textures.


Good luck  😉

Message 4 of 4
in reply to: CyrilCosta

Thanks for getting back to me so quickly.


I see that you use usd/solaris.
Just knowing that ASS can't do that is a step in the right direction.


As for usd/solaris,
I'll take this as an opportunity to try it.
I will take this opportunity to try it.


Thank you very much.

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