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This page provides information on the V-Ray Object ID Render Channel which isolates individual objects with different colors based on IDs for compositing purposes.
Overview
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Parameter
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Common Uses
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The V-Ray Object ID Render Element is useful for isolating geometry in a scene based on the Object ID. This means that items can be isolated by use of a matte, created from the solid colors within the Object ID pass. This method is used to isolate and color correct the ottoman in the example. The ottoman has an Object ID of 1, the floor has an Object ID of 4 and the walls have an Object ID of 2. See how the render looks before and after compositing.
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