Matt Stark came up with a great little 3D viewfinder/polaroid effect in which you can take a photo then insert that geometry into the world – fully interactable. This is kind of like Superliminal, but with the whole world – not just individual objects.

I do love games like this that bend their worlds with effects like this, or non-Euclidean manipulations like Antichamber. The reality is that these types of games are almost always limited to single-player puzzle games. Makes me wonder if there are other applications of such projective techniques beyond puzzle solutions.