One doesn't often stumble over an idea that combines video gaming mythology with 3D printing and interior home décor, but a fan of Valve's game Portal has printed a full-size GLaDOS robotic-arm ceiling lamp.

It's an impressive (and very large) apparatus that hangs from the ceiling and aims its one good eye at the room around it, which should be a familiar sight to Portal-lovers.

Instructibles user Dragonator posted the step-by-step on how to piece together the impressive lamp, warning that you'll need some electronics know-how and should be prepared for a lot of 3D printing.

Dragonator said: "To make this lamp, you will need a printer that is comfortable printing with a lot of support material. The design isn't supportless and is quite hard to print. I used a UP! 3D printer that is more than capable enough printing with support material. All of the parts are designed around the maximum-build sizes of the UP!"

Dragonator hasn't yet figured out how to get the arm to move without overheating the electronics, but is still continuing to modify and improve the creation. Oh, and in case you're interested, the UP! 3D printer clocks in at US$1,400 (around £915). No word on whether or not there is cake.