BR6 - Bryce 6 Scene File
This is a 3D scene file created with Bryce Version 6 or later which is a 3D modeling system. It can include elements such as terrain, trees, leaves, water and skies. It can include other objects such as animals and humans as well as lighting properties as well as other effects. Older versions of Bryce save these scene files as BR5 (Bryce Version 5) and BR4 (Bryce Version 4) extensions.