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  • NVIDIA CUDA – The CUDA engine is supported only in 64-bit builds of V-Ray for Maxwell, Pascal-, Turing- or Volta-based NVIDIA cards. See here if your card has the minimum required compute capability of 5.2.
  • NVIDIA RTXChoosing RTX GPU mode works with RTX cards.
  • Hybrid Rendering (running CUDA on GPU and CPU) V-Ray GPU CUDA rendering can be performed on CPUs and NVIDIA GPUs at the same time. Using the Select Devices for V-Ray GPU rendering tool you can enable your CPUs as CUDA devices and allow the CUDA code to combine your CPUs and GPUs to utilize all available resources.

 

If V-Ray GPU cannot find a supported CUDA device on the system, it silently falls back to CPU code. To see if V-Ray is actually rendering on the GPU, check out its console output.

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When rendering, the V-Ray messages (log) provides information about your current driver version. If the version is not compatible with V-Ray GPU, you will find a message with the recommended version pops up.

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To use NVLINK on supported hardware, NVLINK devices must be set to TCC mode. This is recommended for Pascal, Volta and Turning-based Quadro models. For GeForce RTX cards, a SLI setup is sufficient. Also note that to prevent performance loss, not all data is shared between devices.

 

Choosing Which Devices to Use for Rendering

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