An oak is the centerpiece of this virtual sculpture. Instead of giving off oxygen like a real tree, though, this one produces carbon. The upshot is a piece of sculpture enshrouded in virtual smoke-certainly an unsettling sight; nevertheless, a thoroughly plausible scenario. The work describes a single day, revolving around the central motif of following the path of the sun.

3-D production: Werner Potzelberger / Yama Vienna