Matte Texture Element Rollout

Chooses a method for generating the matte element.

Effect ID
Sets the material ID channel to include in the Matte render element.
G-Buffer ID
Sets the G-Buffer ID to include in the Matte render element.
Include
Opens the Exclude/Include dialog, where you can select objects in the scene to exclude or include in your Matte mask.

When including, all selected objects are rendered with white pixels.

When excluding, all pixels are white, by default. Selected objects are rendered as black pixels.

Warning: If you use Exclude, make sure the Effect ID and G-Buffer ID checkboxes are not on. These modes provide inferior results when used in combination.