Model created in 3D Studio Max 2009 and converted in multiple formats. All formats include materials and texture maps. The Max format uses mental ray materials and render. There's no need for a third party plugin or anything else, just drop your model in the scene and hit render.
Main objects correctly grouped and named accordingly.
Accurate scaled object.
The turret is a separate object and may be rotated at will. The barrel is correctly grouped and linked to the turret so the barrel elevation may be adjusted.
The tracks are made with path deform, the path is kept frozen so they can easily be animated by modifying the percentage.
Four main 2048x2048 texture maps.