Page History
This page gives information on the Cryptomatte Render Element.
Overview
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||out Network|| > V-Ray Render Elements node > V-Ray > Render Channel > Cryptomatte
Parameters
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Parameters
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EXR Metadata – Scene Name Index – |
References
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When in Per Attribute Value mode, the Cryptomatte element supports Packed Primitives or Packed Alembic Primitives only. Attributes placed on the individual face of a live polygon geometry are not supported. The attribute should be of type string, and placed on the primitives of the rendered packed geometry. E.g. you could specify path under Attribute Name for a Delayed Load Alembic file to generate matte IDs based on the partitioning of the Alembic file. |
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When in Proxy Sub-Object mode, instanced V-Ray Proxies share the same internal matte ID, producing the same mask for the same sub-object of every instance. The recommended workflow in this case is to use a separate Cryptomatte render element set in Per Attribute Value mode, with a custom primitive, string attribute placed on the instanced V-Ray Proxies to generate a unique per-instance matte ID, then mask the instances in compositing. |
Common Use
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After producing a multichannel exr image with the Cryptomatte layer, we can use it in a compositing application, such as Nuke, to color correct the image. This example shows the before and after color correcting.
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Notes
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References
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