ID Mask Node¶

The ID Mask Node creates a mask for a particular object or material in the render. It relies on the Object Index or Material Index render pass, which is only available when rendering with Cycles.
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This node is superseded by the Cryptomatte Node. Cryptomatte is more versatile and is supported by both Cycles and EEVEE.
Inputs¶
- ID Value
Input for the Object Index or Material Index render pass. Once a pass is enabled, it can be accessed through the IndexOB or IndexMA slot of the Render Layers Node.
특성¶
- 인덱스(Index)
The index for which to create a mask. This index can be configured for objects at
, and for materials at .Object Pass Index.¶
- Anti-Aliasing
Whether to smooth the mask edges.
Outputs¶
- Alpha
A grayscale image that’s white where the object exists and black where it does not.
Example¶
In the example below, the left and right cubes are assigned a Pass Index of 1 and 2 respectively. We extract a mask for the left cube, then use it to turn that cube red with a Mix Node. The masks for the other Pass Indexes are also shown.

ID Mask node example.¶
Limitations¶
Volume Objects are not supported.