CFAST Disney Animation Studio
CFAST is an animated raster graphics format associated with the Disney Animation Studio application for Amiga computers.
4 bytes - signature 'GUCF', 'LOCK' or 'STDY'
If the signature is 'LOCK' or 'STDY' then a copyright/description message follows: 2 bytes string length n bytes string 'LOCK' means the file was meant to be saved as final/non editable
Then follows the bitmap header: 4 bytes - image width 4 bytes - image height 4 bytes - Amiga screen width 4 bytes - Amiga screen height 1 byte - number of bitplanes (1..5)