This paper presents "Scythe and Sew", a software environment for analyzing lighting simulation data. It provides a spreadsheet like infrastructure for manipulating high-dimensional simulation results. It allos users to both import and create lighting simulation data, or patterns, into a workspace for inspection. A composition area allows the user to perform algebraic operations on the patterns to obtain new insight into the data. This framework allows for a range of lighting assessments including comparing model performance under two standard skies, to a light ing requirement, and at two geographic regions. Various examples are illustrated

Scythe & Sew