Ocean Cliff - Substance Designer Experiment

I finally got around to putting all those tutorials I've been pouring over to good use. This is my first attempt at a rock face; I seem to have some long-standing fascination with black sea cliffs, judging from the way this turned out. The renders are ordered, roughly, from newest to oldest. I went back to the drawing board in the middle of setting up the MDL shader. On closer inspection, there were too many artifacts in the original version. I also wanted to create better wet effects for the Iray render, adding an over-layer with the correct ior for water. The darkening of the rock is now also tied in with the wet settings. I even added HSL and texture contrast layers to make the material a bit more versatile.