I'm using the Fractal terrain to provide the general topology of the scene but it adds in areas where the surface jumps by 200-400m instantly, making it look like an artificial cliff. I've got the following settings: feature scale 1400, Lead-octaves 1, Smallest scale 10, Noise octaves 6, Displacement is applied with amplitude 2000, offset 0, roughness 1, there is no shader set for blending. The other settings are Scale step 3, stretch factor 3, Late deposition 0.06125, Early deposition 0.25, Early deposition rate 2, Warp amount 0.25.
Any explanations, suggestions gratefully received.