Since installing new build and using GPU - problem

[stevesideas]

Message in vray.exe says "error: scene empty", and wont progress past "Building OpenCL trace program....".

CPU seems to work fine.

[stevesideas]

OK. i just read in another thread that it does this initially. Second time (after the initial setup had been created), it was a lot quicker.

[vlado]

Yes, the initial OpenCL compilation may take quite a while.

Best regards,
Vlado

[BLADE]

Yes, the initial OpenCL compilation may take quite a while.

Vlado, can you please offer some explanation whats going on during "Building OpenCL trace program...."?
Because I am sitting in front of real simple scene: A Teapot, a Box and a Dome Light! I took about 3 minutes before starting rendering.

Regards
BLADE

[stevesideas]

It should only happen the first time you render...it does an initial setup...will be faster for every render thereafter.

[vlado]

Vlado, can you please offer some explanation whats going on during "Building OpenCL trace program...."?
Because I am sitting in front of real simple scene: A Teapot, a Box and a Dome Light! I took about 3 minutes before starting rendering.

Regards
BLADE

Good question, I would like to know the answer from the nVidia guys as well All of that time is spent in the OpenCL driver, which compiles the OpenCL code into GPU code. Like I mentioned, it will only do it the first time after a new installation.

We can probably pre-compile this and distribute it along with the installation itself, but I fear this may cause issues as newer drivers are released and the pre-compiled format might become incompatible.

Best regards,
Vlado

[Nicinus]

Perhaps a more practical solution could be if the code could sense this being the first time and then put up a dialog requesting patience, as it is bound to generate a lot of questions for those that haven't read about it before installing.

[vlado]

Yes, might be a good idea.

Best regards,
Vlado