I've had this freeware for a number of years while updating it as new versions come out.  Like Google SketchUp, it's been interesting to see the advancement of the application.  Today I updated the app once more and created a 3D stereo from a 3D model by capturing, panning and capturing again.  It has tutorials and demos and apparently you can download plugins even from Sketchup, Blender, and other applications.  It also allows you to create games and add sound among other things.  In addition, there is an online version as well as a downloadable version.