Glossary
Track matte
Using one layer's luminance or alpha to decide another layer's transparency. A luma matte uses brightness; an alpha matte uses the shape.
In Premation
The TrkMat column in the timeline, or Style ▸ Compositing. Alpha, alpha inverted, luma and luma inverted.
Read the docs: Masks and mattes
Related terms
Try it in PremationFree · AGPL-3.0-only · macOS & Windows