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Chaos Corona Forum
Chaos Corona for 3ds Max
[Max] I need help!
Scaling a Corona volume grid increases rendertime exponentially?
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Topic: Scaling a Corona volume grid increases rendertime exponentially? (Read 1013 times)
2020-02-11, 13:44:55
wilbertvandenbroek
Active Users
Posts: 430
Scaling a Corona volume grid increases rendertime exponentially?
Is this a bug or behaviour that I need to be aware of?
When I import a vdb cache I need to scale my volume grid to match my scene size.
Rendertimes then increase exponentially to a point where you can't render at all.
I can fix this by adjusting the step size. Is this the right workflow or am I working around a bug?
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2020-02-11, 16:09:15
Reply #1
romullus
Global Moderator
Active Users
Posts: 8839
Let's move this topic, shall we?
Re: Scaling a Corona volume grid increases rendertime exponentially?
I believe this is normal. When you scale up VDB object, step size remains the same and since it's expressed in world units, not in percentage, that means much more complex calculation for Corona. Increasing step size is correct solution.
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I'm not Corona Team member. Everything i say, is my personal opinion only.
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2020-02-11, 16:18:05
Reply #2
wilbertvandenbroek
Active Users
Posts: 430
Re: Scaling a Corona volume grid increases rendertime exponentially?
Ok thanks for the fast reply. My smoke plumes are coming along nicely now :-)
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Chaos Corona Forum
Chaos Corona for 3ds Max
[Max] I need help!
Scaling a Corona volume grid increases rendertime exponentially?