Chaos Corona Forum

Chaos Corona for Cinema 4D => [C4D] Bug Reporting => Topic started by: creo3d on 2023-08-06, 10:20:23

Title: Corona 10 slower than Corona 9
Post by: creo3d on 2023-08-06, 10:20:23: Hi!
I've been using Corona 10 for rendering for some time, but I noticed that it slowed down very much when rendering and with large scenes these times are even several hours, where after optimization to 3k resolution, the time rarely exceeded 2 hours for me. Now, those times are much longer. Today I did a test of a simple packshot scene on Corona 9 and Corona 10 and I was very surprised because it is slower and twice as many rays on Corona 10. Below I am posting a photo with statistics. Have any of you had similar experiences with Corona 10?

My setup Cinema r20, Mac OS Catalina,
Title: Re: Corona 10 slower than Corona 9
Post by: Beanzvision on 2023-09-05, 08:03:10: Hi there, we have had similar other reports of such cases and will look into it. Are you able to share your test scene with us?
Title: Re: Corona 10 slower than Corona 9
Post by: Redeemer on 2023-09-05, 10:12:36: Quote from: creo3d on 2023-08-06, 10:20:23
Hi!
I've been using Corona 10 for rendering for some time, but I noticed that it slowed down very much when rendering and with large scenes these times are even several hours, where after optimization to 3k resolution, the time rarely exceeded 2 hours for me. Now, those times are much longer. Today I did a test of a simple packshot scene on Corona 9 and Corona 10 and I was very surprised because it is slower and twice as many rays on Corona 10. Below I am posting a photo with statistics. Have any of you had similar experiences with Corona 10?

My setup Cinema r20, Mac OS Catalina,

I also made a post about it, please send over your scenes to the devs so they can fix this horrible update.
Title: Re: Corona 10 slower than Corona 9
Post by: Beanzvision on 2023-09-20, 13:32:22: Logged for further investigation.
(Internal ID=1197573349)
Title: Re: Corona 10 slower than Corona 9
Post by: steppes on 2023-11-13, 19:04:23: Any news?

I have to render my projects in Corona 9, because Corona 10 takes twice the time! Just about 50% of the speed
Title: Re: Corona 10 slower than Corona 9
Post by: Beanzvision on 2023-11-14, 13:04:21: Hi, as far as I can see, it is still being investigated. Hopefully, more news soon I'm sorry.
Title: Re: Corona 10 slower than Corona 9
Post by: TomG on 2023-11-14, 14:47:31: There was a slowdown due to Triplanar, which was fixed in the daily of 11 on Oct 23rd. Have you tried the latest daily to see if this corrects the slowdown you are experiencing, in case that was being caused by Triplanar mapping? (obviously, if your scene has no triplanar at all, then you can already rule that out as the cause and let us know here). https://forum.corona-renderer.com/index.php?topic=40461.msg218049#msg218049 was the daily that came out in, but best use the most recent daily of course.
Title: Re: Corona 10 slower than Corona 9
Post by: davetwo on 2023-11-15, 14:53:29: Corona 10 has some strange results time-wise. Often it's extremely fast - and then minutes later, much slower.

I just rendered a glass of coffee (set to complete at a noise limit). It finished in 41 seconds.
I then made a small tweak to the mesh and added a couple of percent to a colour value. Then the scene finished in 4 minutes 15 seconds.

It's certainly got me scratching my head!
Title: Re: Corona 10 slower than Corona 9
Post by: maru on 2023-11-16, 17:58:30: There are possibly some fixes in V11 dailies.