[Award Winner] Technique for adding coastal detail as you zoom in.

[Redrobes]

These techniques will work at any size. I guess your having trouble getting some noise at the right scale and density. I am sure Gimp will be able to do it but I don't use Gimp - I use imagemagick which is also free.

Install imagemagick, open a command line - run cmd.exe and type

convert.exe

if that gives a huge list of image options then its installed ok. If it talks about converting drive formats from DOS to NTFS or whatever then its not in the path correctly so add the full path to the file like

C:\Apps\ImageMagick\bin\convert.exe

until you get image options. Then paste this into it modifying the convert to the full path version.

C:\Apps\Imagemagick\bin\convert.exe -size 512x512 xc: -type Grayscale +noise Random -resize 4096x4096 -contrast +noise Laplacian -blur 2 -contrast C:\MyWorkingArea\noise.png

that will give you a 4K x 4K noise map like this.