Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Bug Reporting => [Max] Resolved Bugs => Topic started by: cecofuli on 2013-08-03, 17:27:22

Title: Crop & Region render + rendering time bug
Post by: cecofuli on 2013-08-03, 17:27:22

Hello, same problem here, with A5 31 May ( cause Asset traking and Proxy bug in the OFFICIAL A5)
This problem is random. When I render a crop, sometimes is fast, sometimes is slow.
In this test, from the first to the second render, I just check/un-check the emitter toggle in the shader and click render. No change or modification in the rendering settings, or inside the files etc...
I can see when I have this problem, cause the "Precomputing Secondary GI" is veeeery slooow for a small crop render. Next, the refinement will be slow too.


(http://www.francescolegrenzi.com/Temp/Corona/0001_Passes.jpg)

(http://www.francescolegrenzi.com/Temp/Corona/0002_Setting.jpg)

Title: Re: Crop & Region render + rendering time bug
Post by: cecofuli on 2013-08-03, 17:52:03

If I cannot solve this problem, I save the file as it is,  (no close max) and reopen the file again.

Title: Re: Crop & Region render + rendering time bug
Post by: cecofuli on 2013-08-03, 19:56:08

Same problem with full render =(  and OFFICIAL A5

Title: Re: Crop & Region render + rendering time bug
Post by: cecofuli on 2013-08-04, 14:24:22

Mmm... more strange.
In my scene I've an animated camera. Last night I tried to render some frame.
Frame 0000 = 0k
Frame 0001 = ??? O__O  10 passes in 2 hours?
Frame 0002 = Ok
Frame 0003 = Ok
Frame 0004 =  ??? O__O Again, the same bug.

etc...

(http://www.francescolegrenzi.com/Temp/Corona/0003_BUG.jpg)

Title: Re: Crop & Region render + rendering time bug
Post by: maru on 2013-08-04, 19:55:21

My guess is it's HD cache related.

Title: Re: Crop & Region render + rendering time bug
Post by: Polymax on 2013-08-04, 20:03:02

Very strange, never such was not and can not be repeated.

Title: Re: Crop & Region render + rendering time bug
Post by: cecofuli on 2013-08-04, 22:26:41

Yes, it's very annoying. It's impossible to work!!! Ondra told me that the problem could be in some shaders (textures). But this is not true.
with Ovverride (150 150 150) I had the same problem...
I have to "find" the bug, but it's difficult, cause it 's random. for example, sometimes, only by moving, in the viewport, the "region" rectangle, the speed come back good =(

Title: Re: Crop & Region render + rendering time bug
Post by: maru on 2013-08-04, 22:47:26

Does this happen with the default VFB?
Does this happen when HD cache is disabled (for example when rendering in pt+pt)?

Title: Re: Crop & Region render + rendering time bug
Post by: cecofuli on 2013-08-04, 22:51:15

I think it's geometry related but. But its difficult to understand why it's happen, cause it's so random. If I hide a layer, the speed is good. I unhide and it's slow.
I close max and re-open the file (with the layer un-hide) and the speed is good! Headache!

Title: Re: Crop & Region render + rendering time bug
Post by: maru on 2013-08-04, 23:02:10

Does it also happen when you are not region-rendering, just the whole image?

Title: Re: Crop & Region render + rendering time bug
Post by: cecofuli on 2013-08-04, 23:09:22

Yes, as in my previous message/image: 2 hour and only 10 passes in 1080p

EDIT. in this file I used a lot quadchanfer modifier. BTW, I want to collapse my geometry to a simple edit poly.

Situation: PT+HD = slow. Next, I only change in PT+PT = no problem (obviously)- Return again PT+HD = slow
With no VFB or default, same problem.

Title: Re: Crop & Region render + rendering time bug
Post by: cecofuli on 2013-08-05, 00:14:41

After to convert everything in mesh ( I lose all istances, quadchamfer plug etc...) no bug. The HD is fast now.  I upload the file to Ondra. We will see where is the "bug".
FILENAME: 0004_BUG.rar

Title: Re: Crop & Region render + rendering time bug
Post by: Ondra on 2013-08-05, 02:16:30

Fixed