Model created in 3D Studio Max 2009 and converted in multiple formats. All formats include materials and texture maps. There are two versions of the model: one with the default scanline render, standard lighting and one with mental ray render, materials and lighting. There's no need for a third party plugin or anything else, just drop your model in the scene and hit render. The Su-25, which is no longer in serial production, made its first flight in 1979.The Sukhoi Su-25 is a single-seat, twin-engine jet aircraft developed in the Soviet Union by the Sukhoi Design Bureau. It was designed to provide close air support for the Soviet Ground Forces. Russian air and ground forces nicknamed it 'Grach' 'Rook'. NATO assigned the new aircraft the reporting name 'Frogfoot'.