I'm having trouble finding this in the online documentation... What happens if you specify RGB rather than RGB* as the image type (I'm presuming RGB* means RGB or RGBA) and you get passed an image with an alpha channel? Does the plugin refuse to run (or the Gimp not allow the plugin to run on the image), or does the Gimp (or the library) handle the alpha channel on the fly? -- Robert Krawitz <rlk@xxxxxxxxxxxx> http://www.tiac.net/users/rlk/ Tall Clubs International -- http://www.tall.org/ or 1-888-IM-TALL-2 Member of the League for Programming Freedom -- mail lpf@xxxxxxxxxxxx Project lead for The Gimp Print -- http://gimp-print.sourceforge.net "Linux doesn't dictate how I work, I dictate how Linux works." --Eric Crampton