Power Fractals Noise Modes - No truly clamped PF

[WAS]

None of the PF noise modes create positive only displacement (including clamped mode), is there a way to get this, much like feeding a displacment shader a clamped PF colour setup, where only positive disp is occuring? This would be extremely helpful for working with flat terrains where you can't dig into the surface for reasons like rivers working off of a sphere at planet origin.

[Dune]

Would be handy to have inside the node, but there's an easy workaround if you pull the pf through a displacement to scalar and then a clamp 0, fed into displacement shader.

[WAS]

Yeah that's what I ended up doing after not getting desires look with colour to surface disp. It would make it easier adding up disps with just PFs without slowing down the scene if you have to do it a lot.