I have the paint scheme for my necrons (and it looks bad ass

) now i need the terrain. I was thinking of a swamp terrain (for the base of course) that would have mud and vines and really dark grass. Any suggestions? Any tips on modeling it? (because i don't thing they actually make swamp terrain)
Oh, and i also would like to incorperate swamp water
Also keep in mind that my "use greenstuff" skill is -5 (yes that was totally a
DND reference)
Thanks in advance