[gembud] Image Fading (not)

[ryan jewell <rjewell@xxxxxxxxxxxxx>]

Does anyone remember what you have to do in order to get a national radar
mosaic image to "fade" using the slidebar in NMAP?  Seems like you had to
treat is like a satellite image but I cannot remember the process.
Currently set my X windows to use 256 colors.  MAC OS X.