![]() Samples limit – Determines the maximum number of samples that each pixel in the image receives. This separates the Image Sampler settings of the V-Ray renderer and the V-Ray GPU renderer. Starting in V-Ray 6, the V-Ray GPU Image sampler is controlled using the Samples Limit and Rays per pixel options, instead of the previous Min and Max Subdivs. The hybrid render engine running on a CPU supports the same features as the regular V-Ray GPU CUDA engine. Meaning, this mode can be used on computers that don't even have GPUs. ![]() Furthermore, you can use the CPU as a CUDA device even if you don't have an NVIDIA GPU and/or NVIDIA drivers installed. The hybrid rendering mode does not require any special drivers. To enable the hybrid rendering mode, simply enable the C /CPU device from the list of GPU devices. V-Ray can now execute the CUDA source on the CPU, as though the CPU was another CUDA device. Starting in 3.60, V-Ray GPU can perform hybrid rendering with the CUDA engine utilizing both the CPU and NVIDIA GPUs. Hybrid Rendering with CPUs and the CUDA Engine Turn on the statistics display to check the difference in render speed and to find the optimal settings for your system. However note, that this will reduce the rendering speed. This will break up the data passed to the GPU into smaller chunks so that the user interface requests can be processed faster. For example, you can try values like 64/1 or 32/1. To alleviate this problem, reduce the Rays per pixel and/or the Ray bundle size parameters in the Performance section of the IPR renderer settings in the Maya Render Setup dialog. If you have only one GPU on your system, you may find that the user interface becomes sluggish and unresponsive while IPR is rendering on the GPU. If the Standalone DR server is running as a service, you may need to restart it.įor help on choosing GPU devices with MEL, see the vray gpuDeviceSelect page. It is recommended to utilize a separate GPU for the display, if possible.Īfter changing options, you need to restart Maya and/or any Standalone DR servers (if any are running) for the changes to take effect. ![]() This can affect overall performance, and the render speed might be reduced. ![]() ![]() This is done by using a lower value for Ray bundle size for those GPUs with attached displays ( Rays per pixel is still the same for all GPUs). When enabled, V-Ray tries to lessen their use of GPUs working on displaying graphics to the monitor(s) in order to give them more resources to complete other processes and tasks for the OS. Low priority – This option is visible only if the renderer is set to CUDA or RTX. If none of the devices is selected for an engine that is used, the most optimal options are used by default. You can also set low thread priority of work to each of them.Įngine – Switches between CUDA, RTX and Denoising engine, so you can select which devices to be used based on the engine. The tool controls which GPUs are involved in rendering and denoising. The tool is also found in the Start menu > Select devices for GPU rendering.įor Linux: start vray_gpu_device_select from this location: /usr/ChaosGroup/V-Ray/Maya20nn-64/vray/bin (where 20nn is the maya version) To do this, you can use the Render Device Selection in the UI or find the tool:įor Windows: vray_gpu_device_select from this location: C:\Program Files\Chaos Group\V-Ray\Maya 20xx for 圆4\maya_vray\bin (where 20xx is the maya version). You may not want to use all available GPU devices for rendering, especially if you have multiple GPUs and you want to leave one of them free for working on the user interface or you may want to combine your CPU and GPU together (see the Hybrid Rendering section below). ![]()
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