I'm following them to the letter, but when I get to step 1l (removing the Noise, Clip and Coastline layers) I am left only black sea which doesn't match the screenshots.

Does anyone know what order the noise, clip and coastline layers should be in? My guess from the tutorial is that they are in that order. I'm using GIMP 2.8 BTW.

It also might be relevant that I already have a coastline, so I am using the selection of that outline to limit the area I am painting for the land clouds.