VRAY RT rendering problem on CUDA in 3ds max

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  4 Weeks Ago
VRAY RT rendering problem on CUDA in 3ds max

Hello,

Ive got a problem with Vray RT. I wanted to use Active Shade mode in 3ds max. When I use it in CPU mode it works perfectly. But I wanted to use it with my GPU, so I ran it in CUDA mode. And here is a problem. There are some artifacts, missing poligons etc in render. And it happens only when whole object is visible. Below you can see the screenshot from viewport:



This is whole model, now I run VrayRT on CUDA and isolate 2 objects (just to make it faster):


Here is what I see on render window:


The problem is gone when I run again renderer but on already isolated objects:


Now i can show the rest of the model and you can see that these 2 objects are fine, but on the others there are still artifacts (black spots):


Where's the problem? Is this scene to big (23mlns, its before texturing, mapping and retopo)? Or its sth wrong with my setup, or Vray, or hardware?

Vray 3.5
3ds max 2016
GPU GTX 980 Ti
 
  4 Weeks Ago
There are many limitations to rendering with the GPU - for vray you can check the limitations here:
https://docs.chaosgroup.com/display...ported+Features

FAQ here:
https://docs.chaosgroup.com/display...AX/V-Ray+RT+FAQ

A short guide on how Dabarti uses it here:
http://dabarti.com/vfx/short-guide-...-with-v-ray-rt/
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James Vella
3D Visualization
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  4 Weeks Ago
Try Redshift gpu renderer, much faster and many fewer issues. Also, will never not render due to not enough VRAM, as it starts using system RAM if there is not enough VRAM available. This slows things down yes, but at least it renders. Give demo (fully featured) a try!
 
  4 Weeks Ago
Originally Posted by catche: Try Redshift gpu renderer, much faster and many fewer issues. Also, will never not render due to not enough VRAM, as it starts using system RAM if there is not enough VRAM available. This slows things down yes, but at least it renders. Give demo (fully featured) a try!

Have to agree with catche about redshift, its a great GPU renderer.
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James Vella
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