Use the arrow keys to rotate the model. 'W' to switch from wireframe to solid. 'space' to import a 3D model. Open up a .obj 3D model in a text editor and copy the contents into the answer box.
Thanks to TheLogFather for the fast triangle filler algorithm. That I use when in solid mode. Currently only models that use only triangles are allowed. So you may need to convert them to triangles with a program like blender. There are a few 3D models in the 'OBJ Reader' sprite.
