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With V-Ray 7 CUDA engine is enabled by default for GPU rendering. To switch to RTX (legacy), go to > Settings tab > V-Ray GPU Engine Select rollout rollout.

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Max2024_VRay7Beta_VRayGPU_Settings.gif

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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). To do this, you can use the control in the the V-Ray GPU Render Devices Select in 3ds Max, which allows you to specify which devices you want to use for GPU rendering without restarting 3ds Max.

Alternatively, you can use the supplied GUI tool, which you can find in Start Menu > Programs > V-Ray 6 for 3ds Max #### 20xx > Select rendering devices for V-Ray GPU for 3ds Max ####20xx, where #### xx is the 3ds Max version.


Max2024_VRay7Beta_VRayGPU_selectGPU.png


After changing this option, you need to restart the 3ds Max (or V-Ray Standalone) if it is running for the changes to take effect. If the V-Ray GPU render server is running as a Windows service, you may need to stop it from the Services applet in the Control Panel.

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