For the Command base I tried something a little different. Knowing how Poly filler can crack and flake when dry, I gave It a wash of PVA glue to fix It. It was quite time consuming but for Command bases I don't mind pushing the boat out a little. Gloss varnish was mixed with Scorched brown and a little black to make the wet looking mud.
I made small hoof and footprints in the Poly Filler with a brush and dry brushed with shades of brown.