Holdout

The Holdout shader node is used to create a "hole" in the image with zero alpha transparency, which is useful for compositing (see Alpha Channel).

Note that the holdout shader can only create alpha when Properties ‣ Render ‣ Film ‣ Transparent is enabled. If it is disabled, the holdout shader will be black.

Inputs

This node has no inputs.

Properties

This node has no properties.

Outputs

Holdout

Standard shader output.

Examples

The checkered area is a region with zero alpha.