Japanese artist Nagai Hideyuki makes mind blowing 3D drawings. The artist is skilled in creating perspective-based illusions in his sketches. His anamorphic sketches are on flat surfaces but they appear to come out of paper. He often has two perpendicular sketchbooks that allow for an even more startling effect. Below is a video that allows you to see one of his sketches from multiple angles.

[via DesignYouTrust]