The Penrose Collection features an ever expanding series of maps with a focus on the Surface Division Field. That fancy invention is a new testing element the lab boys at Aperture Science South developed to conjure mid-air portals that allow two-way access to the other side.

The tests will start off plain simple, with an introduction to the Surface Division Field. But with a smooth learning curve future tests will become less and less easy.

So far only the first three maps are done, but I'm working on the fourth. I hope you enjoy the test course, but also the design of the maps. Feel free to give feedback on the maps in the workshop or, even better, on every maps' corresponding thread over at ThinkingWithPortals.com