Lightning problem while rendering an animation #35219

New Issue

Jean-Francois Tasse · 2013-05-05T03:45:09+02:00

2013-05-05 03:45:09 +02:00

%%%--- Operating System, Graphics card ---

Windows 7 64bit QuadCore Intel Q9400 8G DDR2800Mhz , asus gforce gtx 550Ti 1G

- Blender version with error, and version that worked ---

Error: 2.66a no other version

- Short description of error ---

For an unknown reason, you can see the lightning change in the face a couple of time, even if I changed my lightning and render the animation again

- Steps for others to reproduce the error (preferably based on attached .blend file) ---

I just rendered it in png files and assembled it in a raw AVI file.

%%%

%%%--- Operating System, Graphics card --- Windows 7 64bit QuadCore Intel Q9400 8G DDR2800Mhz , asus gforce gtx 550Ti 1G - Blender version with error, and version that worked --- Error: 2.66a no other version - Short description of error --- For an unknown reason, you can see the lightning change in the face a couple of time, even if I changed my lightning and render the animation again - Steps for others to reproduce the error (preferably based on attached .blend file) --- I just rendered it in png files and assembled it in a raw AVI file. %%%

Jean-Francois Tasse commented

2013-05-05 03:45:09 +02:00

Changed status to: 'Open'

Brecht Van Lommel commented

2013-05-06 14:02:29 +02:00

%%%Found the cause of the problem, it's due to the ray bias options that tries to avoid bad ray traced shadows.
http://www.blender.org/development/release-logs/blender-234/misc-improvements/

It's a bit late to fix this for 2.67, but the workaround is to go into the material and disable Auto Ray Bias (optionally you can set a manual value if there are artifacts).%%%

%%%Found the cause of the problem, it's due to the ray bias options that tries to avoid bad ray traced shadows. http://www.blender.org/development/release-logs/blender-234/misc-improvements/ It's a bit late to fix this for 2.67, but the workaround is to go into the material and disable Auto Ray Bias (optionally you can set a manual value if there are artifacts).%%%

Jean-Francois Tasse commented

2013-05-07 00:35:49 +02:00

%%%Thank you so much, super service!!!

have a good week.

JF%%%

%%%Thank you so much, super service!!! have a good week. JF%%%

Jean-Francois Tasse commented

2013-05-07 03:43:21 +02:00

%%%I'm making other test that I did not think about before, and yes disabling auto ray bias stops that,

but I made a test without hair and auto ray bias enable and it has stop, so the bug might be related to the hair.

At the moment of writing I'm trying to see if its because I have activated hair dynamics.%%%

%%%I'm making other test that I did not think about before, and yes disabling auto ray bias stops that, but I made a test without hair and auto ray bias enable and it has stop, so the bug might be related to the hair. At the moment of writing I'm trying to see if its because I have activated hair dynamics.%%%

Jean-Francois Tasse commented

2013-05-07 03:57:07 +02:00

%%%For:

http://www.blender.org/development/release-logs/blender-234/misc-improvements/

I was not using Phong for specula, , I was using diffuse:Lambert and specular : CookTorr%%%

%%%For: http://www.blender.org/development/release-logs/blender-234/misc-improvements/ I was not using Phong for specula, , I was using diffuse:Lambert and specular : CookTorr%%%

Jean-Francois Tasse commented

2013-05-07 04:54:55 +02:00

%%%I can now confirm that it happens only when hair dynamics is on.

Do I need to create another post?%%%

%%%I can now confirm that it happens only when hair dynamics is on. Do I need to create another post?%%%

Brecht Van Lommel commented

2013-05-07 10:45:04 +02:00

%%%No, it's not needed to open another report. Rendering without the hair indeed avoids the problem, the bug happens due to the hair influencing this auto ray bias. But I have to investigate what the proper solution is, if hair should be excluded entirely from this or if it still needs to be taken into account.%%%

Jean-Francois Tasse commented

2013-05-07 16:18:10 +02:00

%%%It only happens if I activate the dynamics (movements),

But if its just hair particles its ok,

Thanks a lot

JF%%%

%%%It only happens if I activate the dynamics (movements), But if its just hair particles its ok, Thanks a lot JF%%%

Brecht Van Lommel commented

2013-05-08 15:28:22 +02:00

%%%Fix in svn now, thanks for the report.%%%

Brecht Van Lommel commented

2013-05-08 15:28:22 +02:00

Changed status from 'Open' to: 'Resolved'

Brecht Van Lommel closed this issue

2013-05-08 15:28:22 +02:00

Jean-Francois Tasse commented

2013-05-08 19:14:00 +02:00

%%%No problems, glad I could help,

Keep on the good work!!!

JF%%%

%%%No problems, glad I could help, Keep on the good work!!! JF%%%

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Lightning problem while rendering an animation #35219