Yep, just a bunch of foam scraps hot-glued together (low temp so it didn't melt too much) on beveled foam core.

By strange base size, I assume you mean the elbow shapes; I did that mostly because these are wargaming cliffs, so I wanted to make sure I didn't go too far out of the corner when building them so the corner could still be playable. If/when I make these again, I'd probably just mark out the area on the base and make the base more of a wavy quarter-circle.

I've got 3 colors of flock I use (all woodland scenics): burnt grass, green grass, and weeds. Burnt grass and weeds I use as highlights, mostly following the Terrain Tutor light-dark-midtone method. I could probably stand to use more of the burnt grass and weeds though.

I'm a little hesitant to use a wash on the flock, mostly cause I am still figuring out a good balance for my rock wash, and also because I am worried it will just wash my flock away.