Lighting is a critical element of theater. A lighting designer is
responsible for drawing the audience's attention to a specific part of the
stage, setting time of day, creating a mood, and conveying emotions.
Designers often begin the lighting design process by collecting reference
visual imagery that captures different aspects of their artistic intent.
Then, they experiment with various lighting options to determine which
ideas work best on stage. However, modern stages contain tens to hundreds
of lights, and setting each light source's parameters individually to
realize an idea is both tedious and requires expert skill. In this paper,
we describe an exploratory lighting design tool based on feedback from
professional designers. The system extracts abstract visual objectives
from reference imagery and applies them to target regions of the stage.
Our system can rapidly generate plausible design candidates that embody
the visual objectives through a Gibbs sampling method, and present them as
a design gallery for rapid exploration and iterative refinement. We
demonstrate that the resulting system allows lighting designers of all
skill levels to quickly create and communicate complex designs, even for
scenes containing many color-changing lights.