Chapter 8 INTRODUCTION TO EFFECTS 213 for personal experimentation. Just taking some of the shapes and using them to warp images into interesting moving backgrounds requires parameters you must discover for yourself. Paint and AniMatte ® If you consider editing to be an interframe process--working between frames--then painting on a frame is intraframe. There is a full palette of familiar choices for anyone who has used third- party painting programs. Brushes can be changed, and areas of the image can be blurred, color corrected, and generally affected like any standard paint program. Multiple layers of paint effects on the same frame are possible, but unlike the other, single- image paint programs, you can easily change the effects over time with keyframes. You can also isolate parts of the frame, say the sky, and draw a matte shape around it to make it a deeper blue. The ability to draw on an object and create control points to adjust curves with Bezier handles and move the edge over time means that almost any part of an image can be manipulated separately from the