Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Bug Reporting => [Max] Resolved Bugs => Topic started by: subpixelsk on 2015-04-01, 14:25:40

Title: Motion blur + particles + hair and fur
Post by: subpixelsk on 2015-04-01, 14:25:40

Hi all

I have some issues with motion blur in combination with hair and fur geometry , I am rendering static frame - no animation but because I have particle flow in my scene that needs to be motion blurred to look correctly I enabled geometry and camera motion blur in corona settings, however this causes me headaches because with hair modifiers enabled (around 150000 strands) the UHD precomputation time went up drastically ..is there anything I´m doing wrong, or is there option to exclude everything but the particle system from motion blur calculations?

Thanks

Title: Re: Motion blur + particles + hair and fur
Post by: maru on 2015-04-01, 15:06:02

I'm a bit lost here. :)
Do you have problems with motion blur or UHD cache precomputation time? Or one is connected with the other?
Are you using hair&fur or pflow, or both?

Title: Re: Motion blur + particles + hair and fur
Post by: subpixelsk on 2015-04-01, 15:28:05

I don´t have problems with motion blur I have problems with precomputation time and crashes when hair and fur and particles and motion blur are enabled together
I am using pflow and hair and fur at the same time

Title: Re: Motion blur + particles + hair and fur
Post by: maru on 2015-04-01, 15:35:09

Could you post an example image/scene?

When using particles + motion blur, it is usually required to use dynamic material operator, otherwise it can produce strange results. Maybe this will help?

Title: Re: Motion blur + particles + hair and fur
Post by: subpixelsk on 2015-04-01, 15:38:12

Hi Maru

I´m using dynamic material operator...and right now I´m trying to render - it goes absolutely fine without motion blur, but when I´d enable it the precomputation time grows from 1 min. to aprroximately 5 mins

Title: Re: Motion blur + particles + hair and fur
Post by: Ondra on 2015-04-01, 15:52:57

If you send me the scene, I can take a look ;)

Title: Re: Motion blur + particles + hair and fur
Post by: subpixelsk on 2015-04-01, 16:08:54

Hi Ondra thank you where can I upload the scene?

Title: Re: Motion blur + particles + hair and fur
Post by: romullus on 2015-04-01, 16:09:45

https://corona-renderer.com/upload/

Title: Re: Motion blur + particles + hair and fur
Post by: subpixelsk on 2015-04-01, 16:27:59

uploaded as 1427898447_054_personal_poliform.zip

Title: Re: Motion blur + particles + hair and fur
Post by: Ondra on 2015-06-21, 17:52:45

I reviewed the scene and it seems it is just too heavy because instancing on hair is not supported yet. We will try to add it in some future update, but there is no support from autodesk on this topic whatsoever