Hue difference when using multiple and different GPUs together

Asked Jul 17 '17 at 21:26

Active Jul 17 '17 at 22:01

Viewed 48 times

I tried to use my older GTX 560 Ti with my GTX 780 to get faster renders, but I encountered this strange behavior when combining them :

I thought that the different CUDA kernels (sm_35 and sm_21) were the cause of this weird tiling effect. However, this does not happen when I use only one GPU (and I get exactly the same results for both GPUs, no blue hue) :

GTX 560 Ti only :

GTX 780 only :

If you have any idea that may explain this, please let me know! :)

edited Jul 17 '17 at 22:01

asked Jul 17 '17 at 21:26

Maxime Michel

As I can't add the links in the original post, here you go ;) :
GTX 780 : http://i.imgur.com/ugGdCfk.jpg GTX 560 Ti : https://i.stack.imgur.com/V2k82.jpg
– Maxime Michel Jul 17 '17 at 21:58
1

I think that the most likely explanation is that you found a bug. Best place to put bug reports? – Jul 17 '17 at 22:11
I'm going to make further experimentation on this issue and I'll submit a bug report then ;) – Maxime Michel Jul 17 '17 at 22:13
what version are you using? – Jul 17 '17 at 22:13
I compile my own version from Git :
version: 2.78 (sub 5), branch: master, commit date: 2017-07-17 16:31, hash: 9bbb197, build date: 17-Jul-17, 21:48
– Maxime Michel Jul 17 '17 at 22:24
before you report anything please use a release version andcheck if you get different results. – Jul 17 '17 at 22:42
That's what I was going to do, don't worry ;) I'm currently troubleshooting the issues, and it seems like it has to do with Image Texture color handling – Maxime Michel Jul 17 '17 at 23:10
Problem not occurring with the official 64-bits Blender version (2.78.1). May have something to do with the latest commits... – Maxime Michel Jul 17 '17 at 23:32
Make sure this is not an issue of your particular build. If it is also present in master then do submit a bug report. – Duarte Farrajota Ramos Jul 18 '17 at 01:30
I also tested on a build from GraphicAll.org and I found the same bug. – Maxime Michel Jul 18 '17 at 09:24
Just to let you know, it has been fixed recently, following the bug report ;) – Maxime Michel Jul 26 '17 at 17:46

Hue difference when using multiple and different GPUs together

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