Dom
Fantastic debut figure...thanks for sharing it with us.
If I can make one observation about mud.
If you are posing a figure standing on muddy ground, remember that wet mud will flick and splatter up the front and the back of a pair of trousers. Knees, elbows and bottoms usually become very muddy too because those are the other major contact points with the ground (beside feet).
Remember, ancient and medieval people wore their clothes for days and weeks before washing them (or themselves), so when its muddy, the mud will accumulate on the clothes in layers and eventually becomes ground in to the fabric.
I'd like to see some mud on the bottom of the shield too.
I hope these comments help.
Cheers