Thanks chaps. The basing is quick drying polyfiller painted with GW Graveyard Earth followed by a wash of GW Devlan Mud then a drybrush of Valejo Dark Sand. Grass tufts are from Mininatur.
I used two different methods for the cloaks.
The brown cloak is GW Desert Yellow, then dry brush with GW bleached bone. Then wash with GW Sepia, then Ogryn flesh, then devlan mud then badab black. Each wash works away from the highlight.
The grey cloak is a straight forward foundy triad with some white added in.
It's sometimes good to add the lighter colours at the edges of the cloak rather than all the way across it.