This is a video of the whole map, since I made this I have added Fog to the entire area, at a distance of 5000, with a density of 0.0005.  Also motion blur and DOT have been added specifially for the outside areas on the DOT.

Also I have trimmed off many much of the BSP, and although this creates a lot of meshes in the map it doesn't effect the performance.

Later on I may stream the levels so that more detail can be added.