I was asked how I did this ... so here it is. I shoot all of my indoor shots in a light tent:
The tent diffuses the light so you don't get as much shine on the plastic figures. I use 2 sometimes 3 natural light daylight fluorescent bulbs (the soft white ones add to much yellow to the picture). The back of the tent is black, so this is perfect for a night shot.
For the grass I use Woodland Scenic field grass in various colors. These have been hot glued to wood bases so they can stand up.
I use this grass in alot of my shots, and normally cover the bases with turf gass. Here the bases will be below the frame, so there is no need to. I set the grass up, with my camera on so I can see how it looks (this is not exact to my picture because I took this all down, then reset it up for this how-to, but you get the idea).
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"It ain't about how hard you hit, but how hard you can get hit, how much you can take and keep moving forward - thats how winning is done!" Rocky Balboa