The V-Ray Masks are used to refine only selected parts of the rendered image in the VFB. They can be applied to Color correction layers and also to Folders in the VFB layers tree.
V-Ray Mask can be created using the Add layer button. The same option is available in the right-click context menu of the layer tree under the New layer category. There's also a quick Mask creation button in the Properties area of Folders and Color correction layers. When one or more masks are applied to a Folder or Color correction layer, a mask icon is placed in front of it in the layer tree to signify its presence. The parameters of each mask are available in their own separate tabs to the Properties of the masked layer or folder.
The masked areas are defined by selection of objects, materials, groups, layers, etc. To specify them respective render elements must be available in the rendered image. Currently, there are three Mask types: Integer Mask, MultiMatte Mask, and Cryptomatte Mask.
UI Path:
||V-Ray Frame Buffer|| > Layers > Add button ||V-Ray Frame Buffer|| > Layers > New Layer right-click menu option ||V-Ray Frame Buffer|| > Layers > Color Correction properties > Add new mask layer button
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Note that you must select a folder or a color correction layer to use masks. Otherwise, the masks are inactive.
