Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Bug Reporting => [Max] Resolved Bugs => Topic started by: Noah45 on 2015-10-30, 02:36:42

Title: Regular rendering doesn't utilise CPU at 100%, while interactive does.
Post by: Noah45 on 2015-10-30, 02:36:42
Every -other Max file I open and render does this: CPU utilization, a double digit loss in speed, IR vs. VFB+

More info in post #13
Title: Re: IR speed vs. VFB+
Post by: Rotem on 2015-10-30, 09:32:51
Title: Re: IR speed vs. VFB+
Post by: Noah45 on 2015-10-30, 16:08:02
Yes, passes take disproportionately longer for a similar resolution.
No difference if color correction is on or off.

Has anyone experienced a similar difference?

I'm not sure if there is a solution, and I'll just have to workaround.
Title: Re: IR speed vs. VFB+
Post by: Noah45 on 2015-10-30, 18:07:28
113 views and one response?

Is there additional information needed ?
Am I not phrasing this correctly?

Seems to me it is a Corona Render Software issue.
Title: Re: IR speed vs. VFB+
Post by: Juraj on 2015-10-30, 18:50:34
Why, because out of those 113 you think everyone uses VFB+ ?

I for example didn't encounter this issue, and my PC renders 100perc. using VFB+ instead of Corona framebuffer but I will try some comparisons to get some passes per minute info.
Title: Re: IR speed vs. VFB+
Post by: Noah45 on 2015-10-30, 19:03:32
They should be using VFB+, it's a great tool :] But unlikely that the VFB+ script would affect the performance. The same condition existed prior to installing VFB+

I do have Max files that render @ 100%, but other Max files render @ ~62% . IR always 100% 
Title: Re: IR speed vs. VFB+
Post by: romullus on 2015-10-30, 19:10:50
Quote from: Noah45 on 2015-10-30, 19:03:32
I do have Max files that render @ 100%, but other Max files render @ ~62% . IR always 100% 

It would be great if you could supply such scene for Corona team to investigate, maybe there's some bugs hidden.
Title: Re: IR speed vs. VFB+
Post by: Noah45 on 2015-10-30, 19:25:54
^Thanks, I'll make 2 scenes, 1 that has both FB/VFB render @ 100%, and a 2nd that is ~62%FB/100%VFB.

Today I reinstalled MAX2016 and RC6, same results
IT friend @ work thinks it may call for a windows reinstall.
Title: Re: IR speed vs. VFB+
Post by: Rotem on 2015-10-30, 21:21:23
Quote from: Noah45 on 2015-10-30, 19:03:32
The same condition existed prior to installing VFB+

Wait, what? I've lost track of what you're trying to claim. Your initial post showed a comparison of the same scene rendered using corona VFB vs. VFB+. Which is it?
Title: Re: IR speed vs. VFB+
Post by: Noah45 on 2015-10-30, 21:26:49
Sorry for confusion. Top image is IR.
Title: Re: IR speed vs. VFB+
Post by: Juraj on 2015-10-31, 00:59:32
But why did you label this as VFB+ if it happened before installing VFB+ ?

Basically, what does it have to do with VFB+ at all ?

Didn't you mean IR vs Normal rendering ? IR just uses Corona framebuffer always right now. Simply switch your framebuffer to Corona back and do the comparison again.

Like in this thread of yours with same issue:

https://forum.corona-renderer.com/index.php/topic,9886.msg63178.html#msg63178

And send such scene to Maru/Ondra.
Title: Re: IR speed vs. VFB+
Post by: Noah45 on 2015-10-31, 01:24:07
It's a simple question that is getting over done. Nevermind 

Solved?
Title: Re: IR speed vs. VFB+
Post by: romullus on 2015-10-31, 10:18:51
Solved? How? Does all your scenes renders at 100% now? If not, you should take all available actions to do so, like reporting a bug and providing enough material for devs to investigate problem and fix a bug in case there is such. To render scenes at half a power is simply not acceptable.
Title: Re: IR speed vs. VFB+
Post by: Noah45 on 2015-10-31, 17:16:57
thanks romullus

1446307746_LJS2_34darkblugray22.7z file uploaded

screenshot for Maru/Ondra.

Title: Re: Regular rendering doesn't utilise CPU at 100%, while interactive does.
Post by: romullus on 2015-10-31, 17:51:41
Moved to bug reporting board, changed topic title.
Title: Re: Regular rendering doesn't utilise CPU at 100%, while interactive does.
Post by: Noah45 on 2015-10-31, 18:18:29
Additional information for troubleshooting

The example uploaded will only render between ~68-74% for both regular and interactive.

Some Max files will render all @ 100%, and others vary 
Title: Re: Regular rendering doesn't utilise CPU at 100%, while interactive does.
Post by: davood.kharmanzar on 2015-11-01, 01:56:07
Quote from: Noah45 on 2015-10-30, 02:36:42
Every -other Max file I open and render does this: CPU utilization, a double digit loss in speed, IR vs. VFB+

More info in post #13

Turn off the "Low priority" option @ render settings ... it may be helped !!
Title: Re: Regular rendering doesn't utilise CPU at 100%, while interactive does.
Post by: Noah45 on 2015-11-01, 02:35:34
Was worth a try, and it did seem to average a couple % pts. (75% vs ~72%) thanks

Uploaded a new file for the Corona Team.

1446341553_Test2.7z
Title: Re: Regular rendering doesn't utilise CPU at 100%, while interactive does.
Post by: Ondra on 2015-11-02, 14:45:55
both scenes render here fine. Have you tried unloading the VFB+ and re-rendering, or trying Corona VFB? Alternatively, you can capture a minidump while Corona is rendering (see https://coronarenderer.freshdesk.com/support/solutions/articles/5000524006) and send it to us, we can take a look if something is blocking the computation
Title: Re: Regular rendering doesn't utilise CPU at 100%, while interactive does.
Post by: Noah45 on 2015-11-05, 01:47:14
Picked that same project up, and it's cooking along nicely. I'll take a mini dump, if it happens again... : ]
Title: Re: Regular rendering doesn't utilise CPU at 100%, while interactive does.
Post by: Ondra on 2016-04-24, 23:06:55
seems irreproducible
Title: Re: Regular rendering doesn't utilise CPU at 100%, while interactive does.
Post by: hrvojezg00 on 2016-04-25, 10:32:15
I have a similar problem, cpu utilization drops to 60ish%. Also using VFB+, will check if native Corona FB renders better. I think it also has something to do with Siger materials.