Blender Foundation: Blender 2.x BF release: Detail: 25200 gamma problem using python render commands

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[#25200] gamma problem using python render commands

Date:
2010-12-13 14:04 Priority:
3

State:
Closed

Submitted by:
Thierry Maes (tmaes) Assigned to:
Campbell Barton (campbellbarton)

Category:
None Status:
Fixed / Closed

Relates to: Duplicates:

Patches:

Summary:
gamma problem using python render commands

Detailed description

I have made this thread on blenderartists where people told me to submit this problem as bug...
http://blenderartists.org/forum/showthread.php?t=203016
The bug seems to be in my second problem in this thread:

When, in my script, I call the bpy.ops.render.render() command, the rendering result is darker then a 'F12' rendering (gamma problem I guess).
People can reproduce using my script on the default startup scene.(tested on Blender 2.55 windows current build python 3) =>the saved file in the output folder is different then an F12 rendering.

So this is my first bug, don't burn me if I did it wrong...I tried to find similar issues without success.

Hope it can help...

__
Thierry Maes

Followup

Message

Date: 2010-12-13 14:58
Sender: Ton Roosendaal
It would help if you follow our bug report guidelines...
- always attach a sample file here
- reduce your example to the absolute simplest case that shows an error
(for example, is just a render command + save command sufficient?)

I don't know the py api well, but i noticed you save a 'render result' which is in linear color space by default. Save a PNG or so to compare.
Similar saved files you would get on simple F3 save render-result. When you load this back in Blender it shows corrected OK.

Date: 2010-12-14 05:19
Sender: Campbell Barton
Reported already as bug #25073, fixed r33526, closing.

Attached Files:

No Files Currently Attached

Changes:

Field	Old Value	Date	By

status_id	Open	2010-12-14 05:19	campbellbarton
close_date	None	2010-12-14 05:19	campbellbarton
assigned_to	none	2010-12-14 05:19	campbellbarton
Status	New	2010-12-14 05:19	campbellbarton