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The V-Ray Denoiser takes an existing render and applies a denoising operation to it after the image is completely rendered out via normal means. The denoising operation detects areas where noise is present and smooths them out. Images can also be denoised using the Standalone Denoise Tool included with the installation of V-Ray for Maya.

Because the V-Ray Denoiser operates on other render elements (like RGB_Color ) rather than being part of the rendering process itself, the denoising operation does not require re-rendering of the scene.

There are three denoising engines to choose from - the Default V-Ray denoiser, the NVIDIA AI denoiser (V-Ray's implementation of NVIDIA's AI-based denoising algorithm) and the Intel Open Image denoiser (V-Ray's implementation of the Intel® Open Image Denoise). See the Denoising Engines section for for more information.

The V-Ray Denoiser has three preset options for its settings: Default, Mild, and Strong. Parameters can also be adjusted directly by using the Custom preset. 

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To use render elements, select from the Available render elements column and click the Add button to add the passes you wish to generate at render time. When you render the scene, the added render elements listed in the column on the right, will also render, which can be viewed from the VFB window's channel drop-down menu.

For more information on the parameters on this dialog, see the Render Elements tab page.

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When denoising IPR renders, it is recommended to use the NVIDIA AI or the Intel Open Image denoiser. Both of the engines ensure fast denoised results.

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  • To use the denoiser in IPR with the VFB, add a Denoiser render element and select an IPR Engine.

    • Alternatively, you can add a Denoiser render element inside the VFB. Open the Denoiser Layer from the Layers tab. Click on the Add Denoiser to the scene option. Start a new render to apply the changes.



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  • To use the denoiser in IPR with the VFB, add a Denoiser render element and select an IPR Engine. Alternatively, you can add a Denoiser render element inside the VFB.

To use the denoiser with Viewport IPR:

  1. Add

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  1. a Denoiser render element and choose

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  1. an IPR Engine.

  2. Start V-Ray IPR in the Maya viewport using the V-Ray logo icon in the viewport:

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  3. Enable the viewport denoiser by clicking

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  1. the Denoiser icon ( Image Modified ) next to the V-Ray logo.

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Notes

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  • Image denoising takes place after the frame has been rendered, so the results of denoising will not show up until all rendering has finished.

  • Textures or materials such as VRayStochasticFlakesMtl that could be considered to have a purposely noisy look are not considered "noisy" by vrayRE_Denoiser, and are not affected by the noise removal process.