So I've decided to try an experiment with this technique: a poster-sized map. I'm going for a 10200x6600 pixel image, which I intend to print on a 22x34 inch poster at 300 dpi. This is about 8 times the size of the largest maps I've made to date. I'm up to the point where I'm placing mountains. I'm having no stability issues so far with GIMP, though the file size is growing quite fast (500 MB and climbing). Swapping layers and running filters takes longer, but the commands are working. I'm curious to see how WILBUR handles it.

Any suggestions and/or adjustments to the tutorial that you'd recommend? I'm thinking that when I get to WILBUR, I should cut the percentage noise to 0.5% or so. I'm also trying to keep the layer count in GIMP as low as I can.