Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Bug Reporting => [Max] Resolved Bugs => Topic started by: Dom74 on 2013-08-31, 01:31:37

Title: Adaptivity - rendering becomes very slow after reaching the limit
Post by: Dom74 on 2013-08-31, 01:31:37

Hello.
I'm not sure it's a bug, I'm rendering a scene with PT+HD and using adaptivity, but when the "recalculate every" pass is reached, rendering speed slow down significantly.
For example, adaptivity is set to 15 and "recalculate every" to 200, every pass is rendered in 2 or 3 seconds, until 200 passes are computed, after that, each pass take more time, about 7 or 8 seconds.
I have tried with "recalculate every" set to 50 or 100, and obtained same result.
Also, I'm not certain to understand well the adaptivity parameters, can you explain me how it works ?
thanks.

Title: Re: Adaptivity - rendering becomes very slow after reaching the limit
Post by: Ondra on 2013-08-31, 01:56:47

yes, this is a feature, because after every "recalculate every" passes the adaptive supersampling is updated. Each pass then takes longer, but produces better results. What you want to try is setting recalculate every to about 5-10 and adaptivity to about 5. But it is still not working well

Title: Re: Adaptivity - rendering becomes very slow after reaching the limit
Post by: Dom74 on 2013-08-31, 03:44:11

Ok, thanks,
I will make some more experiments.

Title: Re: Adaptivity - rendering becomes very slow after reaching the limit
Post by: xt13r on 2013-08-31, 10:59:42

sorry for interrupting, what is adaptivity? and recalculate every? i see them in a new corona release and found it in corona documentation, but there is no description.

Title: Re: Adaptivity - rendering becomes very slow after reaching the limit
Post by: Ondra on 2013-08-31, 11:54:15

it is an adaptivity attempt that is currently not working very well