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Scene Color Managment Settings

Posted: Thu Nov 07, 2019 8:55 am
by PetrT
Hi
Now in viewport preview the scene is more darker then in render.
(All image plugins are off)
How setup the scene what the result will be the same

Re: Scene Color Managment Settings

Posted: Thu Nov 07, 2019 9:30 am
by Dade
Can you post a test scene ? What version are you using ?

Re: Scene Color Managment Settings

Posted: Thu Nov 07, 2019 10:00 am
by PetrT
test scene
think that it is problem with area lamp
Final render is over exposed

Re: Scene Color Managment Settings

Posted: Thu Nov 07, 2019 10:28 am
by Dade
PetrT wrote:
Thu Nov 07, 2019 10:00 am
test scene
think that it is problem with area lamp
Final render is over exposed
It sounds like the some problem described here: https://github.com/LuxCoreRender/LuxCore/issues/257

I'm going to check.

PetrT, are you using the v2.2 too or a daily build ?

Re: Scene Color Managment Settings

Posted: Thu Nov 07, 2019 10:38 am
by PetrT
daily build
Just one note that if no lamps just env light is used result is right
Render is going on OpenCl

Re: Scene Color Managment Settings

Posted: Thu Nov 07, 2019 3:49 pm
by zuljin3d
In daily builds, I also have problems.(on cpu)
There are no problems in the viewport (brightness is good)
But when rendering, the result is bad. (Everything is much darker than in viewport)


PS:In version 2.2, everything is fine.

Re: Scene Color Managment Settings

Posted: Thu Nov 07, 2019 5:32 pm
by Dade
I have the feeling the problem may be in BlendLuxCore because if I export the scene and do the rendering outside Blender, I seem to get the correct output. A comparison between, inside and outside Blender rendering:

comp.jpg

Note: the viewport pre-view disables PhotonGI and Env. light cache in order to have a fast start so some difference may be even expected.

Overall, the Blender color management looks a bit strange, the default gamma seem 1.0 instead of the ubiquitous 2.2 :?:

B.Y.O.B. has to look into this problem but, unfortunately, he had some problem with his ISP and is unable to access the forums since Monday so this may take some time.

Re: Scene Color Managment Settings

Posted: Thu Nov 07, 2019 6:29 pm
by kintuX
Blender 2.81, using ACES, CPU vs OCL shows the difference in Sky intensity :?
Image

PS
Same result with RTpath preview:
Image

Re: Scene Color Managment Settings

Posted: Fri Nov 08, 2019 2:04 pm
by Dade
Dade wrote:
Thu Nov 07, 2019 10:28 am
It sounds like the some problem described here: https://github.com/LuxCoreRender/LuxCore/issues/257
My first hypothesis should be right, I fixed the above bug and now the view port and final render outputs look the same to me. The automatic build should be ready in about 3 ours, can you check if it work for you ?

Re: Scene Color Managment Settings

Posted: Fri Nov 08, 2019 2:06 pm
by Egert_Kanep
Awesome, thanks for the effort