Chapter 7
Masks & Keying
These topics are tied together in one chapter because they are so related. Masking refers to using media with an alpha channel to hide parts of another piece of media, and keying refers to assigning certain information in a piece of media to be hidden so that other media can show through. We’ll begin by looking at masking, then we’ll explore how easy it is to use some of the excellent keying filters inside Boris.
Masks
Any media with an alpha channel can be used as a mask. Spline media, line art, and text may also be used as masks. The latest versions of Boris applications allow the unlimited use of masks, meaning you can add virtually limitless masks to any given track. However, with a good understanding of how masks ...
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