Using the Roto Brush tool in Adobe After Effects CS5 and max tutorial

Using the Roto Brush tool in Adobe After Effects CS5 and max tutorial

When you draw or paint on the frames of a movie, you're rotoscoping. For example, a common use of rotoscoping is to trace an object, using the path as a mask to separate it from the background so you can work with it separately. Traditionally in After Effects, you drew masks, animated the mask path,max tutorial and then used the masks to define a matte. (A matte is a mask used to hide part of an image so that another image can be superimposed.) While effective, this is a time-intensive, tedious process, especially if the object moves a great deal or the background is complex.

If a background or foreground object is a consistent, distinct color, you could use color keying to separate the object from the background. If the subject was shot against a green or blue background (max tutorial ), keying is usually much easier than rotoscoping.

The new Roto Brush tool in After Effects CS5 is much faster than conventional rotoscoping, and for movies with complex backgrounds, it's much easier than keying. You use the Roto Brush tool to define the foreground and background elements; thenmax tutorial , After Effects creates a matte and tracks the movement of the matte over time. The Roto Brush tool does much of the work for you, leaving only a little clean-up work to be done.

If a background or foreground object is a consistent, distinct color, you could use color keying to separate the object from the background. If the subject was shot against a green or blue background (green screen or blue screen), keying is usually much easier than rotoscoping.

The new Roto Brush tool in After Effects CS5 is much faster than conventional rotoscoping, and for movies with complex backgrounds, it's much easier than keying. You use the Roto Brush tool to define the foreground and background elements; then, After Effects creates a matte and tracks the movement of the matte over time. The Roto Brush tool does much of the work for you, leaving only a little clean-up work to be done.

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