They also download at the same time as Score data, before all other cast members, so they are always available when the movie requires them. A shape of any size, color, or pattern adds only 64 bytes to the file size of a movie. Fill shapes with custom tile patterns to make them more interesting. Shapes do not distort when they change dimensions. Shapes animate slightly slower than bitmaps, but their small size and downloading speed usually make up for this shortcoming.
Small graphics Try to make all bitmaps as small as possible.
Make sure that there is no extra white space around the image. If possible, use several copies of small bitmapped cast members to create large backgrounds. Tiles Use tiles to fill in large areas with more interesting patterns than those available in the default pattern palette. Create several tiles based on bitmapped cast members and switch between them to create simple, fast animations. When you fill shape cast members with a custom tile, it remains 64 bytes, no matter how large the image.