Making breakwalls/waters

[Buffalonian2 6]

Wondering if anyone else has tried this, I'm looking for advice and ideas. I terraform them, and I have a few problems. The first is, it is impossible to make a wall/hill that's rounded on the top - the top always has a narrow strip of flat land. Diagonal break walls look pixelated on the top because of this. Soften tool can not change this, or any of the other tools for that matter. I even tried to make it narrow as possible in a grayscale heightmap. I tried covering the flat grassy part with oil/ore to try to mask it, but it's too close to water so it gets that beach texture that can't be covered up. I could live with that beach texture if the walls didn't look so damn pixelated. I should have taken some screenshots, I'll add some later.

  Edited June 20, 2015 by Buffalonian2