Making Not So Random Coastlines in GIMP

[Mercutio361]

Reppin' this! Thanks for this one. It's a simple but super-helpful lesson!

[WarBeer]

Hello RobA! Thank you SO much for all your GREAT tutorials I'm a bit "green" to all of this....but I'm really enjoying this site!

So, concerning the "Not so random coastlines" technique presented here. When I went with the 50px blur and full noise (using shape very similar to yours) I noticed that the fractalization could get a bit unrealistically random. So, I played with the values. When I reduced the blur to about 25px it was a bit more convincing on my image. However, I quickly realized that there were gaps/holes in the coastline. This of course slows down the filling process a bit. Is there something I can do to easily fix this? I'm guessing that the white from the cloud-noise must align with the edge at times?

[AriusAneid]

Really interesting technique! Just getting started out and this alone has made one of my first tries look much more realistic. Thanks for the information!