I'm attempting to create a map with a lot of vertical gameplay.

In an attempt to focus on gameplay, I'm only creating the very basic brushwork. Once I'm happy with the gameplay I'll add textures, lighting, props, and more detailed geometry.

The theme of the map is undecided at the moment. Although I'm leaning towards the inside of some sort of Combine science testing silo.

I would appreciate any comments on the general layout so far. There is much much more to be done, and I'll be updating the screenshots as I go along.