Crash when set to Cuda

[Macker]

My VRay RT crashes when I switch it to CUDA mode, I have an NVidia GTX285 (3gb) with the latest drivers, so it should support CUDA. I get an error as soon as I hit render saying Vray standalone is not responding.

Should probably mention that I'm using 3ds Max 2013.

[super gnu]

i have the same graphics card. i have the same problem.. but i dont have the latest drivers so assumed that was the problem. im in max 2012.

[Macker]

Yeah it's definitely a VRay problem as it isn't max that crashes, it's VRay and i'm able to continue to work within max.

[vlado]

The CUDA engine only supports Fermi and Kepler cards, which means that 2xx cards and older will not work (there is a technical limitation for the number of kernel arguments that they accept).

Best regards,
Vlado

[super gnu]

ok that explains it

[AbnRanger]

I have a GTX 470 (Fermi) and it crashes with CUDA every time, without fail. Will work just fine with CPU, but not CUDA. OpenCL had some weird artifacts. I updated to the latest NVidia drivers for the card, and initially CUDA worked for 30 sec or so, but soon got the Windows notification that VRay standalone crashed and wanted to send information about the crash.

[vlado]

We have a 470 card here and it works flawlessly... what happens if you use OpenCL?

Best regards,
vlado

[AbnRanger]

All I will get is an indefinite black screen with the standard "waiting for image data" text. I can wait several minutes and it still remains that way.

[tashko.zashev]

Could you post a screenshot of your V-Ray RT render server console window.

[AbnRanger]

After testing another scene, CUDA seems to work correctly there. The only thing I can think of is that CUDA and OpenCL have issues with VRay light materials (I have a color correction map driving the opacity channel) in this recent build? The very same scene posed no problems in the previous one (with Max 2012).

[vlado]

Hm, it should work fine (at least here is fine)... can you get me (a part of) that scene to vlado@chaosgroup.com?

Best regards,
Vlado

[jacksc02]

Vlado,
I am having a similar crash with VRayRT in max 2013 with the latest build.
RT loads all the bitmaps then crashes when it starts to calculate the lights. If I run RT a second time it all works perfectly.
GTX560 with the 301.42 drivers.
If you want a scene I can pack it up and send it over to you or I can just send a screen grab of the console.

[vlado]

A scene would be better - thanks!

Best regards,
Vlado

[jacksc02]

What is the best email to send a download link to?

[tashko.zashev]

Hello Chris,
You can send the file or link to: support@chaosgroup.com