[QUOTE=RobA;9404]Post 3: Then Let's Begin (if I have an idea)

Create new layer called “Land Noise” and fill it with clouds (Filter->Render->Clouds->Solid Noise) Set the detail to the maximum (15) and the X and Y size to the max (16.0). The larger the size, the more randomness your final coast will have. Give it a new random seed and jot down the number (I put it in the layer name afterwards as a reminder). And change the blend mode to Overlay.

Hello there.. I seem to have trouble getting this to work right: I'm using GIMP 2.6.6 and attempting to follow everything to the letter. When you refer to "blend mode to Overlay", do you mean the "Blend Tool" on the left side toolbox, or the "Layers Mode on the right toolbox. I tried both ways, and nothing seemed to work right, and I cannot get the cloud layer displayed over the land areas as displayed on the next screenshot. It just shows up as gray sea (colour level adjusted to 71 on white land. I've been going back and forth over this for a while. Please help!