Appearance Compatible File Types

I’m writing an Apple Script droplet that will automatically set image files as the desktop picture. I’m limiting the types of files that can be used (with this script) because the image files must be compatible with the OS 9 Appearance Control Panel. Here’s my list of the file types that can be used :

8BPS (Photoshop)
BMP
clpp (Picture Clipping)
GiFf
JPEG
PICT
PNGf
PNTG (MacPaint)
SGI
TIFF
TPIC (Targa)

That list is probably good enough for most users... Can anyone think of another file type that should be in that list?