Hi all,

The Blender 2.67.1 r56693 have a big bug with Cycles GPU with importance sampling (environement but maybe also all importance sampling) that freeze the computer, need to hard reboot with reset button. No error message, just freezes with importance sampling GPU.

My config is I7 860 // 16 Giga ram // 2x Zotac Geforce GTX 670 4 giga // driver nvidia 314.22.

If you want other information that can help to solve it, contact me.

Hope can help to fix,

Matt

ps : the fast plane for gpu is just amazing for hairs
_________________
Matthieu Barbié
http://matthieubarbie.wordpress.com/

Hi again,

I just forget the system version, Windows 7 x64 sp1 up to date.

Matt
_________________
Matthieu Barbié
http://matthieubarbie.wordpress.com/

Hi all again,

Oki I found more information to debug the crash. With hair in gpu + importance sampling (environment), the computer only freeze, but without hair, it make an error, this one :

http://matthieubarbie.files.wordpress.com/2013/05/capture_error-with-importance-sampling.png

Hope can help to debug, cause the last buildbot still have the bug.

Best regards,

Matt

ps : no sli enable in my config but two card.
_________________
Matthieu Barbié
http://matthieubarbie.wordpress.com/

Hi all,

The bug was solved in this build :

@marcoG_ita,
Here is a test build with osl = Cycles_Hair_Shader.Win7.x64-56921
The build has the default cuda kernels 2.0, 2.1, 3.0 using toolkit 5.0
Great work on the shaders BroadStu

Cheers,
~Tung

Matt
_________________
Matthieu Barbié
http://matthieubarbie.wordpress.com/