User guide

Chapter 3 Basic Compositing 267
Stencil Luma
The Stencil Luma blend mode does the same thing as the Stencil Alpha blend mode,
but uses the affected layer’s luma value to define transparency. Stencil Luma is useful if
the object you want to use for cropping has no alpha channel of its own.
Silhouette Alpha
Silhouette Alpha is the reverse of the Stencil Alpha blend mode, and is useful for
cutting holes in objects underneath.
Silhouette Luma
Silhouette Luma is the reverse of Stencil Luma.
Object used for silhouette End resultObject underneath
01112.book Page 267 Sunday, March 13, 2005 10:36 PM