just insert the attached clip file in your project. Then enter the right camera position in the cube camera, then double click on the cube render node, and go to the sequence tab and render the 6 image sequence.
You must have TG2 Deep + Animation to make this work. Otherwise, you need to manually change the camera orientation after every frame.
One last advice: for cubes, it's better to disable the enviro light and exchange with the fill light setup which can be found here in the file sharing area (sticky post).
Regards,
Frank