Thanks bwtr.  Happy to do so. I've just started to really get into experimenting with displacement and I was really surprised how easy it is to use. Here's a simple hexagonal shape extruded into some low-poly columns. I applied the Black Basalt preset(oddly enough) and added an Enhance C fractal into the displacement channel. I like the way it adds an unevenness to the columns and makes them much more natural and rocklike. I may make a few more variations and some rubble to the replicator and have a go at modeling the "Devil's Postpile".;-)