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Pearson Education, Inc., 221 River Street, Hoboken, New Jersey 07030, (Pearson) presents this site to provide information about Adobe Press products and services that can be purchased through this site. You can draw masks in common geometric shapes-including polygons, ellipses, and stars-with the shape tools, or you can use For example, you can use an effect to generate a running light around a mask.Ī mask belongs to a specific layer. Open paths cannot create transparent areas for a layer, but are useful as Masks can create transparent areas for a layer. A closed path is continuous and has no beginning or end, such as a circle. An open path has a beginning point that is not the same as its end point forĮxample, a straight line is an open path. Vertices define where each segment of a path starts and ends.Ī mask can be either an open or a closed path. A mask consists of segments and vertices: Segments are the lines or curves Use of masks is to modify a layer’s alpha channel. Use masksĪ mask in Adobe After Effects is a path, or outline, that is used to modify layer effects and properties. There will be times when you won’t need (or want) everything in the shot to be included in the final composite.