Animation is far more expensive than still
pictures. Multimedia animation runs anywhere
from 1 to 30 separate frames per second, and,
depending on the complexity of the images and
how they are generated, that can start to add
up. It's worth it, though, if motion is critical
to visualizing the idea. Clip animation libraries
exist, but you will likely need to create
original material for most projects. Modulate
between photorealistic 3D and simple 2D line
drawings, depending on audience, content, and
budget.