How to Transition with Track Mattes in Adobe Premiere Pro

The only good track matte is an animated track matte.

In the wonderful world of compositing, the track matte can be a confusing tool. This might be due to the fact that other compositing methods are much more straightforward. 

Take masking as an example. A mask is exactly what it sounds like—it masks or hides part of a layer by simply making it transparent. You can use the pen or shape tools to easily mask out part of a layer, in turn r...

Source : https://nofilmschool.com/2018/02/track-matte-trans...