Nice work Horizon.
In a couple minutes of testing I do see problems though.
The Large Landscape appears to have some collision isses, entities float above it when trying to place them on the ground.
Landscape2 appears to be fine.
I think the scaling of the models is slightly off. They seem a bit large. For instance the console, when you walk up to it the players perspective puts the consoles height right about nose level and seems a bit large all around. Try scaling it down some in the fpe.
The same goes for the doors on the building. When you walk up to it the players perspective puts the "open" keypad \ lit display at about forehead height.
These are really nice with the exception of the scaling tweaks needed and the collision issue with the LandScape-Large.
I'm testing these in FPSC[x9], I will keep testing and let you know if I run into anything else.
Again, NICE WORK!