Drawing is hard, and portraits especially so. To characterize what is hard or easy about it, 258 charcoal drawings, completed in real-world conditions from photographs (two-dimensional, 2D) and from direct observation of the same subjects (three-dimensional, 3D), were assessed both subjectively and objectively. There was no difference between drawings made from 2D and 3D in their subjectively rated accuracy or quality, or their objectively measured geometric accuracy. However, the semantic contentportraits versus still lifes-had a significant impact: By most objective measures, portraits were more accurately drawn than still lifes but viewers rated them as less accurate and of lower quality.