Have just completed basing my Mantic Orcs up with sand. I mixed in some rougher gravel into my regular sand. This provided two things - makes my mini heavier (I like the metal feel-I'm old school) and creates thicker texture!
This is what they look like at Stage 2 of the painting process. Going to get into bulk painting them in about 2 weeks from now. Targetting to finish the base coats up.
You can spot some shiny silver gravel. That's the harsher gravel I have added into my sand mixture to provide texture.
The final basing technique will be finished with snow as my Orcs come from the highlands. Booldugz!