 |
About mask paths
A mask in After Effects is a drawn path consisting of path segments and vertices. Segments are the lines or curves that connect two vertices. Vertices define where each segment of a path starts and ends.
In addition, the mask you create can be either an open or closed path. An open path has different beginning and ending points; for example, a straight line is an open path. A closed path is continuous and has no beginning or end; for example, a circle is a closed path. Closed-path masks can create transparent areas for a layer. Open paths cannot create transparent areas for a layer, but are useful when used as a parameter for an effect; for example, creating a visible line or shape from the mask using the Stroke effect. (See Applying effects to a mask.)
Related Subtopics: