I'm trying to write write a script-fu to automatically take a finished image and produce a set of scaled images for display on a web site. The learning curve for this is rather steep.... To get started, I've been reading through some of the existing scheme files. One I am looking at is script-fu-unsharp-mask. There appears to be an idiom that I can't figure out, a series of lines like this: (original-layer-for-darker #f) (original-layer-for-lighter #f) (blured-layer-for-darker #f) (blured-layer-for-lighter #f) what is the "#f"? roland -- PGP Key ID: 66 BC 3B CD Roland B. Roberts, PhD RL Enterprises roland@xxxxxxxxxxx 76-15 113th Street, Apt 3B roland@xxxxxxxxxxxxx Forest Hills, NY 11375