VrayRT for CUDA

[cecofuli]

hi Vlado,
In chaosgroup, so you use a 4 GPU 295gtx PC with no problem for the VRay-RT. And it work well?

Paul, can you hare the link to the "car" i-ray video ?

[vlado]

In chaosgroup, so you use a 4 GPU 295gtx PC with no problem for the VRay-RT. And it work well?

No idea, still waiting for the motherboard to arrive...

Best regards,
Vlado

[posterus]

Hi Vlado,
As an option, we offer 4X GTX 295 systems. They are production systems that work right out of the box, CUDA included. http://www.renderstream.com/HPC.html

We are really interested in GPU render acceleration and we're willing to offer ChaosGroup any of our 8 GPU systems at cost to help you develop this technology. If you wish to build your own we might also be able to source the neccesary parts and provide them at cost as well.

Let me know if you would be interested.

best,
Joe Pizzini
RenderStream
joe@renderstream.com

[devin]

Vlado will there be a limit to the number of GPU's or video cards we can network together or is it unlimited? Is the first release still going to happen this quarter?

[vlado]

V-Ray itself has no limit on the number of GPUs that can be used, but drivers or operating systems may have restrictions. As for the release, I cannot comment on this just yet.

Best regards,
Vlado

[Subburb]

waow... RTT / lightmaps baking will soon become completely obsolete for realtime viz... Thanks Chaosgroup !

[casewolf]

I want it really badly, will there be a demo?! This would change my workflow and results instantly.

+1 for Vray RT GPU

[vlado]

There is no need to wait for the GPU version to get the workflow of V-Ray RT; the CPU version supports DR so it can be made quite fast as well.

Best regards,
Vlado

[fabriceb]

yes, for DR I can confirm that I am using Vray RT with 9 render nodes (each quad CPU) and the feedback is really impressive. It's great to place/tweak lights and materials, basically any tweaks that need doing. the main problem for me right now is the lack of vray proxy and xref support. I wouldn't wait for the GPU version to come out before buying it... it's a young product but for it's price it already has enormous value to me.
(The memory limitation for gpu version seems a big hurdle too...)

[GLASS-CANVAS]

In fact I noticed a pretty massive speed up by just adding a single 8-CPU DR slave to my existing 4-CPU VRay-RT setup. It may not be real-time in the way that the GPU-accelerated version is but it's still damn fast.

Vlado, have you recompiled VRay-RT for OpenCL? If so is there any difference between CUDA and OpenCL?

[vlado]

Yes, it works completely in OpenCL now. Speed-wise, they are both very close in the latest driver releases. OpenCL has a huge advantage over CUDA in that it can compile the scene shaders on the fly, meaning that we can do procedural textures and complex materials. (of course, that will change once again if/when full C++ is available for CUDA...)

Best regards,
Vlado

[devin]

Vlado is Chaos still planning on releasing the GPU version during this quarter?

[vlado]

I'm not quite sure yet; but as pointed above, you don't have to wait for it to get that kind of performance. V-Ray RT can get you quite fast results with DR already.

Best regards,
Vlado

[devin]

Yes I already have RT but we're waiting until the GPU version comes out so we'll know what kind of new hardware to buy instead of just buying more render nodes.

[vlado]

Ah. We are waiting for Fermi to come out before giving any recommendations on hardware

Best regards,
Vlado