Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] I need help! => Topic started by: alebul on 2015-05-08, 05:57:23

Title: Slow render with carpet
Post by: alebul on 2015-05-08, 05:57:23

Hello. How to speed up render time in scene with carpet? Carpet created by Cscatter. In one object for instances - 7472 polys. Scatter count - 100000. Without carpet render time about 3 hours, with carpet - 7 hours. Is only one way - decrease geometry of carpet?

Title: Re: Slow render with carpet
Post by: maru on 2015-05-08, 10:33:42

Optimizing the scattered objects is definitely a good idea. You may also try scattering proxies instead of original geometry. Aren't you running out of RAM?

Title: Re: Slow render with carpet
Post by: Ondra on 2015-05-08, 11:39:25

The most helpful thing would be if you could post screenshot of the stats sidepanel in VFB for both versions of the scene

Title: Re: Slow render with carpet
Post by: alebul on 2015-05-09, 05:26:12

This is scene without carpet.
(https://dl.dropboxusercontent.com/u/15981603/screens/1.JPG)
with carpet
(https://dl.dropboxusercontent.com/u/15981603/screens/2.JPG)
this is object for instances
(https://dl.dropboxusercontent.com/u/15981603/screens/3.JPG)
and this is task manager
(https://dl.dropboxusercontent.com/u/15981603/screens/4.JPG)

Title: Re: Slow render with carpet
Post by: romullus on 2015-05-09, 10:26:37

It looks pretty much normal to me. Your carpet occupies almost half image area, so it is expected to have significant impact on render times. One thing you can try is to reduce polycont of carpet. Unless you plan to put a camera inside a carpet, you can simplify fibres model a lot, like a ten times and you still couldn't tell a difference.

Title: Re: Slow render with carpet
Post by: Ondra on 2015-05-09, 15:10:53

yes, it looks normal. The carpet occupies HUGE portion of the image, and the scene is otherwise very simple

Title: Re: Slow render with carpet
Post by: cecofuli on 2015-05-09, 15:22:58

Maybe, when Corona will supper hair&Furn or Ornatrix, we will can speed-up rendering time (like in VRay)
right now, with this huge 3d modeled carpet, it's very hard to keep the rendering time low.

Title: Re: Slow render with carpet
Post by: alebul on 2015-05-09, 20:56:42

Thanks for answers, I think reduce geometri or other model help me.