vlado thanks it worked…
as mentioned after a while.
thanks alot.
now using nvidia drivers 276.42 for Quadro 2000, and the 2.20.02 build of V-ray RT, but the “Building OpenCL trace program” has taken 10min so far, and nothing to show for it. How long does it take?
Generally the new build works great with the CPU rendering, but I just can’t get past the “building” stage with GPU
Does anyone know if the Maya update arriving this month still ?
No, we won’t make it unfortunately; the 3ds Max release happened a bit later than originally planned and everyone is away next week. But it will be the first thing we will work on in January.
Best regards,
Vlado
There are still the nightly builds if you want to try a particular feature.
Best regards,
Vlado
Yes, it can take quite a while. I think it was well over 7 or 8 minutes in my case. The newer code can also take quite a bit of RAM to compile, so you may be paging to disk or something like that. Monitor your RAM usage in Task Manager to see if you are using up all of your RAM while compiling.
Hope this helps,
-Alan
The newest 290.x drivers are quite fast if you have the RAM; they take about 64s seconds to build the OpenCL code from scratch for the Quadro 2000M on my laptop and the GeForce 580 GTX on my workstation. Unfortunately the Tesla and full Quadro drivers seem to be a bit behind…
Best regards,
Vlado
Thanks for the pointers.
I can’t find drivers 290.x, highest available seems to be 285.x but they seem to be older than the ones I’m using.
To put a bit more info into the mix, here are some stats of the machine that seems not to build the OpenCL trace program:
3DStudio Max 2012 - nitros shaded (not realistic)
Intel Xeon E5649 2.53GHZ (2 processors) (6 cores - hyperthreaded = 24 cores)
24GB Ram
nVidia Quadro 2000 graphic card, dual monitor.
I put two boxes into a new scene, a v-ray light, a v-ray sun, and set the GI on. I then set the active shade to OpenCL and hit render. Time just ticks by and nothing happens.
I’ve put a screenshot of relevant info below to help
Please let me know if there is any more info that would help.
Regards,
Bill
P.S. I was impressed last time this didn’t work, with the response from an email I submitted via email. I quickly got a new version of V-ray that worked, and when I had another problem with it, the response was also quick.
Great work Chaos group.
P.P.S. still waiting at 09:34 (started at 09:14:45 according to log). Ram use is barely changing, and processor usage is still at 4%. Not much happening really.
When I did the build opencl,
it was with a plane and a teapot and it took about 30-40 minutes. So let it go 
I have a scene with two cubes and a flat poly, and I’ve given up after waiting for an hour.
Any suggestions?
This does not depend on the scene at all; it is done just the first time to compile the OpenCL code. The time depends on the graphics card and the driver version. Older (non-Fermi) cards and older drivers (f.e. the quadro drivers) might take a very long time. Will see if we can put a precompiled version of the code somewhere.
Best regards,
Vlado
Can I ask a perhaps silly question… Do you know what the significance is of the driver numbers for the nVidia drivers? I presumed that it was the higher the number the more recent/up-to-date, but this last time I’ve looked there are much higher numbered driver versions that were released earlier in the year. Should I be looking at the release date, the version number, or indeed just using the latest versions that are recommended?
I’ve still had no joy trying to get the openCL thing to build 
I’ll keep trying.
I just upgrade to 2.20.02 (from 1.5 SP6 !) and I have to say…Wooow ! great great great !
but as LQ2, I have the same problem… (Is it ok for you now ?)
No problem with CPU but not GPU… All seems to be right until “Building OpenCL trace program…” and after loooong time, vraystand alone crash.
Ok, for the moment, I just tried with the old driver 263.15, I’ll try with the last 285.62 for my GTX460 and I’ll cross my fingers 
Good to know, although I haven’t had time recently to continue my testing with vray, although I have an almighty render in the pipeline for it though
I didn’t get a reply to my initial email about a nightly build, I thought perhaps it was because the next release was due.
If this doesn’t work for you, you might want to try the 290.xx beta drivers, which are up on the nVidia site and do support the GTX 460, according to the supported hardware list. I say this because, since the new Vray release, these drivers have been working well with RT/GPU here and elsewhere.
Also, if you are working with 6GB RAM or less, you may have issues with the initial OCL compile as it does takes quite a bit of RAM to complete.
Hope this helps,
-Alan
Hi ,
Thx for your advice Alan.
All is fine now. And I have to say it’s a real pleasure…
First (and I don’t know why !), I tried with the 275.33 driver…the compile Open Cl code took 1hour… After that, I downloaded the last driver from Nvidia site.. the last one for the GTX 460 is the 285.62.. and then It took 1min to compile the code.. Now RT GPU works fine.
Now as you said, I saw that the 290.xx support the GTX 460.. I have only 8Gb RAM but I think the compile could be done fine even if I’m thinking to add 8Gb RAM, 16 Go become necessary
Anyway, could I expect to have a real gain between the official 285.62 and the 290.53 ?
Hmmm…that would be a question for Vlado, but I can tell you that recent RT/GPU builds have optimizations which made RT/GPU 17% faster here with the latest drivers (the same build that is slower and takes more RAM to compile), and those of course were the 290.xx ones. You might do some benchmarking and give them a shot…
And you should be good with the 8GB for the compile, I think. I did it here with 6GB, but it did take a while.
Best,
-Alan
PS - Your english is fine!
Ok, thanks
I’ll give a try !
cheers
I updated one of my workstations to vray 2.2 today. Looks like I have the same problem with vray-RT hanging on “Building OpenCL trace program …”. It’s been running for 50 minutes now and still no sign of life…
The workstation is a dual xeon with 24GB RAM and a quadro 4000. Any recommendations for a working driver version for the quadros ?
Thank you.
EDIT : after a little more than an hour the building finally succeeded. That’s insanely slow !!
am having the same problem. Updated from 2 to 2.2 and lost ability to RT on GPU (except in my case it’s a 5700 ATI instead of an nvidia). Tried rolling back vray to 2 again and it would crash each time I ran it. Reinstalled drivers (11.11) and vray 2.2 and still no go as far as running VrayRT for GPU. All I have to work on is a black screen and “waiting for image data…”
BEFORE I reinstalled drivers, 2.2 with GPU render was rendering the whole scene black except for lights
It would also seem that I have lost the ability to see the log (that would pop up when rendering). So I can’t send / see what exactly is happening with the render.
Windows 7 64 bit, ATI 5700GT. I know i’m running a single GPU but it was working before updating to 2.2
Thanks for taking a look into this