Instead of putting pen to paper and letting the two-dimensional line flow, you’re drawing the line into that third, Z-axis. This can be a profound and, sometimes, profoundly disturbing experience. CreoPop uses a fairly rare, at least at a consumer-level, technology to make 3D drawing possible. The device combines a photopolymer gel with a fat pen equipped with three UV lights that harden the gel as soon as it exits the pen tip.