Detailed exterior, simple interior.
Every object has material name.
Three .max scenes: vray 3ds max 8 materials , mental ray 3ds max 2010 materials and 3ds max 8 simple standard materials
Other formats with simple, named materials.

In .max file you can change level of detail by increasing/decreasing mesh smooth ms x0 = 100 000poly , other formats converted with mesh smooth x1 = 220 000 poly.

Preview renders in mental ray.