Secret development tricks are still hiding just beneath the surface in 'Portal 2'

It's amazing what the right kind of lighting and special effects can do.

It can convince you that brown structures and basic textures are actually the backdrop to an eerie, post-apocalypse-set dilapidated laboratory.

But that's the least tricky development trick that YouTube user Shesez -- whose Boundary Break series takes viewers beyond the bounds of the camera tied to the protagonist -- finds hidden just beneath the surface in 2011's amazing Portal 2.

Shesez, as you'll see in the video, may also have found the reason to GLaDOS's madness. Sure explains a lot (and also, but more importantly, nothing at all).