Is it possible to build a material/texture that would work similar to the ground texturing in many strategy games (C&C, Starcraft, Total Anhilation).

The idea is to have a couple of square ground textures, and place these beside eachother in a non-repetive way, to add variation to the texture without having to make a 32767x32767 texture BMP.

For those of you who have worked on the level editor of the earlier mentioned games, you definetly know what I mean.