Images used for most tests:
    alexa.gif           242 x 299
    keksi.tga           172 x 180

Image used for command WarpFunct:
    warpTree.tga        128 x 256
    warpTreeAlpha.tga   128 x 256

Image used for command ApplyLogo:
    logo.tga            100 x 100

Images used for command DrawBrush:
    keksi.bsh            50 x  50
    star.bsh             50 x  50

Images used to generate above brush files (see makebrush.tcl):
    keksi_bsh.rgb        50 x  50
    star_bsh.rgb         50 x  50
