In this video the people behind the 4D puzzle game Miegakure are explaining their work on creating worlds in four spatial dimensions. Instead of building objects with triangular meshes they make use of tetrahedral meshes to support their design. Lovely visuals and very interesting. Art meets mathematics. Check it out!
YouTube: Designing a 4D World: The Technology behind Miegakure [Hide&Reveal]
Photo credit: Miegakure