GIMP Plugin Registry

Makes landscapes around these lines, no color tho, that has to be done manually with overlay and multiply layers
Width
Height
Use Thumbnail sizes (400 x 300, good for a quick preview until you get something amazing)
Seed 1
Seed 2
Balance (affects the contrast/brightness balance in one of the mid steps, can give a little more "crisp" to final product) Detail (detail values in the difference clouds)  read more »