Casting concrete is one of the strongest, cheapest ways to erect a structure. But creating complex concrete structures presents new challenges.

A group of graduate students at the Bartlett School of Architecture in London have created a technique for affordably building intricate concrete structures. They're calling it Augmented Skin.

Their method involves building inner scaffolding with sticks, stretching fabric around it, and pouring concrete into the flexible, twisty shapes.

The results look uncannily like giant skeletons.

Unlike traditional concrete molds, which really only work for simple uniform structures, Augmented Skin allows for the possibility of wildly detailed and unique pieces.

It’s a low-cost technique: all you need are wood sticks, fabric, concrete, and coating for casting, for which the group used PVA glue.

So far the students have created prototype structures as big as gazebos.