Thanks for the clip, Ryan, I'll certainly plug it in today. Never saw your earlier work, I wasn't there back then, but it looks good. And, Martin, thanks for your suggestion; I did put some fake stones in as spikes, as well as stretched ridges, but I might enhance that (and put some voronoi in).
I agree with the too white color and too much reflection. I looked at quite some photo's, and some glaciers are really bluish, other quite white, some also have dirt and gravel in them in stark lines.
I got some sort of moraine now, by merging the mask with itself through a color adjust shader, and also tried to get some 'TU-snow' in there. Problem was that due to the displacement intersection, there was a sharp edge on the glacier, so I restricted the effect with a distance shader. I'll take it out again, maybe.
I was wondering which height the distribution shader reads, the one after compute terrain, or the last one in line?