What parameters have an influence over voxelization time ?

What parameters have an influence over voxelization time ?#303210

By osuire - Mon Jun 29, 2009 2:04 pm

- Mon Jun 29, 2009 2:04 pm #303210

I've got a render taking forever at the Voxelization stage ("Start Voxelization").
There are SSS and displacement materials in there, and the polygon count is around 620 000...
Is this too high ?

Thanks !

Re: What parameters have an influence over voxelization time ?#303212

By JDHill - Mon Jun 29, 2009 2:19 pm

- Mon Jun 29, 2009 2:19 pm #303212

afaik, no parameters do - scene complexity, # of instances...these are what determines it. If it's taking a long time, it may be due to the presence of intersecting instances, so you could try checking on that.

Next Limit Team

Re: What parameters have an influence over voxelization time ?#303213

By Mihai - Mon Jun 29, 2009 2:21 pm

- Mon Jun 29, 2009 2:21 pm #303213

Check that you're not using adaptive in the displacement settings, or lower the precision setting and see. What are your displacement settings and texture size for the displacements?

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Re: What parameters have an influence over voxelization time ?#303231

By osuire - Mon Jun 29, 2009 4:51 pm

- Mon Jun 29, 2009 4:51 pm #303231

Thanks guys.

After making a few tests, I think displacement is the cause.
Lowering the precision and unchecking "Adaptive" did the trick.

Would it be possible to make the render log a bit more specific about what is taking up computing time ?

Cheers,

Re: What parameters have an influence over voxelization time ?#303251

By Bubbaloo - Mon Jun 29, 2009 7:48 pm

- Mon Jun 29, 2009 7:48 pm #303251

It's actually before voxelization that the displacement calculations happen. And this process is not multi-threaded. You will notice that once it starts voxelization, the process becomes multi-threaded. It is a request I have put in a few times to make these displacement calcs use 100% of my cores instead of 12.5%... Hint hint HINT.