Well... this would be an ideal candidate for my new script

(Just loose the grid first)

to get a result like this with one click (more or less):

temp1.png

Otherwise, a few suggestions are:
- use layers (they are your friend)
- always keep the file as a .xcf to preserve all the layer goodness
- save as png

Here is another off-site tutorial on dungeons in GIMP:
http://www.homeport.org/~bcordes/gam...with-gimp.html

And a GIMP mod I made of a photoshop tutorial:
http://www.cartographersguild.com/sh...3&postcount=16

-Rob A>