the geosculpting of GeoControl is far better then greyscale manipulation. But in version 1 it is limited to natural changes, for example to terrace a part of the terrain, or to build a round hill landscape, with soft erosion traces and in another part of the same terrain a ridged mountain, with smooth and convincing rising out of the soft landscape. So the brush can manipulate the height, the slope, but also the general look, by changing the filters for the brushed part.