Quote - There's no point in plugging the same node into bump and displacement.

And it doesn't look like you have displacement turned on. The bump is only going to do the same as displacement without actually moving the vertices.

When trying to work out displacement, do that alone, and set the amount high so you can see it. Work out the desired pattern with the amount exaggerated, so you can see it. Then dial it back.

In this render, the donut on the right has a very high displacement amount - 5 times what I plan to use. I can see the pattern easily.

Ah good tip.  I've started with turbulence in the displacement node, but its producing hard edges so I'm going to work with clouds next.

WARK!

Thus Spoketh Winterclaw: a blog about a Winterclaw who speaks from time to time.

 

(using Poser Pro 2014 SR3, on 64 bit Win 7, poser units are inches.)