A fabrication method was developed that combines two already existing concrete 3D printing methods: the extrusion printing method, and the powder printing method. This combination of techniques has given rise to a form of supported extrusion, whereby the concrete is extruded layer-by-layer over a bed of granular support material. Due to the support, the resulting extruded concrete is of a much higher resolution with large overhangs. The supported extrusion method has therefore presented the opportunity to design forms that are more varied and more volumetric, as opposed to the very straight vertical forms so far achieved in 3D concrete practice.