Crazy VR game lets you explore a world made from 4D mathematical models 4D Toys also works on iOS, Windows; was borne from upcoming puzzle game Miegakure.

Any object in Cinema 4D can have an ‘Align to Spline’ tag placed on it, which moves the object along the length of the spline and keeps it headed in the direction of the spline.

For 3D work, I personally use Cinema 4D as my main package, but you could just as easily use open-source Blender (see our roundup of Blender tutorials) to keep your costs down.