I'm trying to create white peaks, but I'm not sure why the fuzzy zone doesn't work when constructing the white peaks. No matter the feature, the cut-off is a solid line, unlike when it's used on normal terrain. I tried adding even a dark surface layer before the white peaks with a colour enabled and set to a dark colour, but there is still not fuzzy zone when messing with the parameters.
Additionally, you can't seem to preview the surface layer results. It shows nothing, not even the test colour, though it is there in preview and render.