Page MenuHome

Background rendering longer 10 times than UI rendering
Closed, InvalidPublic

Description

System Information
Operating system and graphics card
Gentoo amd64, Ubuntu x64 (different machines) ; gtx 780, titan black; 6 and 7 cuda versions
Blender Version
Broken:2.74, 2.75
Worked: not found

Short description of error
Hello
Please help me to solve this problem.
I run several scenes in background render via "blender -b my.blend -a"
And get veeeeryyy long rendering time.
Why?
This is my scene (559MB) https://yadi.sk/d/9vPLDCvjhh3Yx
Please test it to compare background and ui render times
Thank you

Details

Type
Bug

Event Timeline

Could you try to first reproduce this behavior with a smaller scene? Having to download 560MB makes checkin the bug a bit unpleasant ;)

Bastien Montagne (mont29) triaged this task as Needs Information from User priority.Jul 9 2015, 10:23 AM
Bastien Montagne (mont29) claimed this task.

No news since one week…

Hello
It occurs only with the scene with the flag. In other scenes, there is no problem
I can't to change a flag scene to more smaller, because it has backed cloth.
So, try to test it.
Thank you for Blender developing!

I tested the scene with dimensions set to 40% and I get the exact same render speed per frame when starting with F12 from within Blender and from commandline. Tested on OSX 10.10 with GTX970.