Hi, Krahel, and welcome. I used GIMP for a little bit, it's a nice tool. Took me a while to figure out where things were. There are some really nice tutorials for GIMP. One from OldGuy for realistic coastlines and Vandy has put a thread together containing tutorials in PDF format > https://www.cartographersguild.com/s...oastlines+gimp.

Keep up the good work. I'm still working on my map elements to find what I like best. It's a fun, relaxing adventure.