Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] General Discussion => Topic started by: ae28402dk on 2013-08-10, 15:47:12

Title: slow rendering.. really slow
Post by: ae28402dk on 2013-08-10, 15:47:12

Hi, I'm testing corona 2-3 weeks. Always was rendering so fast, but today is so slow. 13 passes in 90 minutes (res 3700x2080 pix)...
I have hdcache. i7, 16gb ram, 2g graphic.

What can I do to make rendering faster?

Title: Re: slow rendering.. really slow
Post by: Ondra on 2013-08-10, 15:48:42

Are you using motion blur?
Portals?

Title: Re: slow rendering.. really slow
Post by: ae28402dk on 2013-08-10, 15:50:29

No motion blur, no dof, or any other unusual effects.
I stopped rendering and started again, but it's still slow, initial pass in 10 minutes, it always was only few seconds. :(

Title: Re: slow rendering.. really slow
Post by: rafpug on 2013-08-10, 16:09:47

You used materials with high values ​​of refraction?

Title: Re: slow rendering.. really slow
Post by: ae28402dk on 2013-08-10, 16:13:28

yes, but it was never a problem for corona on my computer. In my last scene I used more materials with high values ​​of refraction, but rendering was 10 times faster.
Could it be a problem with 'visibility for camera"? Because I have hidden some objects.

Title: Re: slow rendering.. really slow
Post by: rafpug on 2013-08-10, 18:58:16

1 - What are these objects?
2 - The scene is outside or inside?
3 - Is converted into a scene full crown or designed from scratch to you?

Give it a try and reset the render settings

Title: Re: slow rendering.. really slow
Post by: ae28402dk on 2013-08-10, 19:07:46

1. 6 or 8 glasses, and few kichen accessoires
2. inside (it's a kitchen)
3. designed by me

I was restetin corona setting 3 times, but it doesn't work, it's even crashing when rendering :/

Title: Re: slow rendering.. really slow
Post by: rafpug on 2013-08-10, 19:23:13

uninstall corona

and installs .

Title: Re: slow rendering.. really slow
Post by: Polymax on 2013-08-10, 22:18:46

You use last DayBuild?

Title: Re: slow rendering.. really slow
Post by: Ondra on 2013-08-10, 22:38:37

ok, give me the scene, I'll take a look

Title: Re: slow rendering.. really slow
Post by: ae28402dk on 2013-08-12, 16:30:26

Problem solved, I finished rendering after 36hours and only 300passes, closed the scene, and opened several times, and everything came back to normal. I think it's another bug in corona alpha. 

Title: Re: slow rendering.. really slow
Post by: Ondra on 2013-08-12, 16:44:50

By any chance, are you using max 2014?

Title: Re: slow rendering.. really slow
Post by: ae28402dk on 2013-08-12, 17:21:49

Yes, 2014, could it be because of that?

Title: Re: slow rendering.. really slow
Post by: Ondra on 2013-08-12, 17:27:20

Yes, there is a bug that causes some textures to be EXTREMELY slow when 3dsmax is first run. Usually just stopping/restarting rendering works.

Title: Re: slow rendering.. really slow
Post by: ae28402dk on 2013-08-12, 17:55:02

Thank you for your reply, even with bugs I'm truly impressed by corona :)

Title: Re: slow rendering.. really slow
Post by: ae28402dk on 2013-08-14, 13:17:17

The same problem again, but this time reseting the rendering doesnt help. Also the issue is that rendering 24h with 200passes is not equal with quality of 5h and 200 passes when program is free of bugs (after 100x reseting).

Title: Re: slow rendering.. really slow
Post by: Ondra on 2013-08-14, 16:02:15

so... extremely small number of rays/s in the beginning, and then it starts to increase?

Title: Re: slow rendering.. really slow
Post by: ae28402dk on 2013-08-14, 16:13:26

Quote from: Keymaster on 2013-08-14, 16:02:15

so... extremely small number of rays/s in the beginning, and then it starts to increase?

Yes :(

Title: Re: slow rendering.. really slow
Post by: Ondra on 2013-08-14, 16:22:29

ok, then it is the same bug. I also get it from time to time, unfortunately currently I have NO idea what is causing it :/

Title: Re: slow rendering.. really slow
Post by: ae28402dk on 2013-08-14, 16:29:00

I've noticed that bug appears sometimes when some objects are "invisible for camera", but not always. In other cases I don't know why this bug appears.
Another question: Is it normal that when I try to zoom while rendering the corona is crashing?

Title: Re: slow rendering.. really slow
Post by: Ondra on 2013-08-14, 16:32:10

are you using alpha v5, or daily builds?

Title: Re: slow rendering.. really slow
Post by: ae28402dk on 2013-08-14, 16:32:36

alpha v5

Title: Re: slow rendering.. really slow
Post by: Ondra on 2013-08-14, 16:38:52

yep, there was a bug, but I hope it should be fixed already in next release