I've made a crater in a biome (absolute2(sum2d(Ditches+constant2d)). Now...around those craters I want to have hills, forests etc.
However, when I combine this crater with e.g. angled hills or whatever, the crater itself gets messed up. Of course I could use 'min' or something, but then I don't get the hills. Is there a way of say...masking a noise filter so that the crater will stay intact but that the hills will spawn around the shore? I guess making my own noise pattern as a picture would work, but I'm wondering if there's another way of doing it.