German Armour
How did you make the mud? It looks very realistic!
The short answer:
2 oz Mod Podge Gloss
.5 oz water
2 oz black top soil (baked at 325 for 10+ minutes depending on volume)
2 oz espresso grout / clay earth 50:50
The water effect is Magic Water. The mud was made to look wet with Wilder's Muddy Water Effect.
That was after several evenings of experimentation (re-posted from another board):
Did some more experimenting today and I think I've got it. The base glue is Mod Podge Gloss; unlike the matte, it has a bit of shine to it which makes the mud look a little wet.
Pigments tried: a brown pastel shaved with a blade, raw umber acrylic, burnt umber acrylic paint.
Mixture elements: I bought a bag of topsoil from Lowes, nice and dark... but too moist. I baked in an oven at 325 for ten minutes and it dried nicely, if less dark. Still kinda chunky, I ground it with a pestle and sifted through a strainer. Now I had something that looked promising.
Others: Lowes cement sand and Dave's dirt.
I played with many combinations of these (more than seen here) but I think I have a winner.
I started the afternoon out with a time test to see how long I should wait before imprinting the glue with the tread marks. Hours. It has to be nearly fully cured or it will just mash through the tread and just look like a mess.
However, my mud concoction cures in minutes. The formula: Mod Podge Gloss, grout/Dave-dirt mixture, and the oven dried topsoil, ground and sifted. Sets up in minutes (that's the grout, I guess) and really takes the tread mark quite nicely.