[CONAN]

The only thing I could tell you is that there is LOD for aircraft, and for destruction on statics only a texture and a mesh.

So, for statics, their are a "live" and a "dead", nothing like "wounded".

Buildings are clean or destroy, but nothing between.

Do do what you ask, all models have to be completly re-meshed with LOD, that means a lot of work (I guess, not nothing about 3D modeling).

Don't know if it answer to your asking, if not, let me know...

CONAN