Multi-layer Keying in After Effects Part 3 - Dealing with Edge Issues

In this third tutorial in a set of four on basic multi-layered keying in Adobe After Effects using Keylight 1.2, Andrew Devis shows how to deal with a specific problem that can occur with some keyed footage, namely that of strong lines appearing on some edges of the keyed footage. In this tutorial, Andrew shows how to select the areas with problems while still maintaining a good over all matte through the use of other layers.