BuShips, Great stuff there!
MrCrazy, I use a combination of terrain boards or cloth with terrain pieces on top. There are so many options. I don't buy a lot of terrain these days. I prefer to make my own stuff. For buying Sci-fi defenses and some generic tech stuff I'd recommend Antenoci's workshop at:
http://www.barrule.com/workshop/gallery%20-%20scifi.htm
Very nice things he makes. I don't own any yet since I spend too much on figures.. :lol:
Here's some quick stuff I throw together for games and some pics. I have a lot of power tools which does help. I also recycle when possible. As a bonus it leaves more money for figures.
I use liter water bottles with the top cut off and hot glued on a base and painted. I put a dome on the top using metallic plastic easter egg halves. Add a door and some symbols or pipe details and I've got a tower.
I make shrubs from aquarium plants, cut to shape and in some cases hot glued to cardboard discs (Pogs for those who remember that fad).
I make rock formations from crumbled up cork tiles.
I make domed buildings from 1/8 inch mdf cut and glued to upside down dollar store bowls as entrances.
I make tunnel entrances from mdf cut discs, painted black with the outer perimeter coverd with glued on aquarium pebble gravel.
I make wire fences from art store sculpting armature screens cut into strips and hot glued to a base and with plastic upright poles glued on.
When I make terrain boards I use 2" thick insulation foam in 2x8 foot sheets and a hot foam cutter. I primer them with a gallon of $5 "oops" paint from the local Home Depot if I can find a nice brown color. I use the latex house paint so the foam doesn't melt. Then I can later cover that layer of paint with most other things without worrying much about the foam.
Here are some pics of some of my terrain from past SST and other games showing some simple structures, tunnel entrances, rock formations, and in the second picture some foam terrain boards:
From a Shockforce game before we laid troops out:
And the following is from a Chronopia game that shows the small shrubs made from cut down strands of aquarium plants hot glued to the circle bases:
Good luck on whatever you decide to buy or make!