Drawing results with MR guidance (Reality) Strokes with drawing sequence (Virtual) Inside view in Oculus Stroke guidance & real strokes 3D pen 'WireDraw' MR guided 3D drawing Oculus rift + two web cameras start end a b c extruder Figure 1. (a) We present a mixed reality system, called 'WireDraw', to immersively guide 3D wire objepct drawing using a 3D extruder pen. (b) Given an input wire model composed by curve segments, our system optimizes the combination and ordering of the curve segments based on a set of drawing principles for easy wire object sculpturing. (c) High-quality wire objects can be easily sculpted by novices using our system.