TNTsim3D is a handy, easy to use application specially designed to enable you to fly over 3D terrains with keyboard or joystick controls.

Use the professional TNTmips software to prepare Landscape Files (.sim) for TNTsim3D from objects in your TNT Project Files (.rvc). The TNTmips data preparation step (Support / TNTsim3D Landscape Builder) creates a terrain object and a texture object which are specially optimized for real-time interactive 3D simulation. The terrain and texture objects are bundled together in a Landscape File (.sim).