If you are playing 2.4 dev, please check out the alien base map. It is currently the end of the game, but you can play it in Skirmish mode whenever you'd like. Lots of improvements have been made to the graphics that you will see throughout the game (new particle effects, normalmaps on many textures), but the alien base is the first map that was built from the ground up to utilize the newest features of our engine. It's not next-gen or anything, but it shows the potential of the engine as it currently stands.