Blender is a free, open source 3D rendering program with many features.
You can use it to make 3D games, movies, and lots more.
To run the inbuilt scripts, you'll need a copy of Python installed on your system.
A tutorial can be found at their website, but I recommend
this one, because it actually shows many screenshots which can help a lot.
This program is compatible with Windows.Blender WebsiteBlender Forum