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.
The turret is a separate object and may be rotated at will.
The 2S25 Sprut-SD is a self-propelled tank destroyer or light tank, built on the BMD-3 chassis. Designed for use by the Russia VDV airborne forces it is light and highly mobile.