Effect Effect was originally designed by Rob Shakespeare in the mid 1990's as an instructional tool for stage lighting design. Using Effect, a user is able to quickly explore the effect of stage lighting on actors. Effect relies on Python, Tcl, and Radiance. Development efforts were initatied by Kurt Zimmerman (formerly with CICA at Indiana University) and ran only under the IRIX operating system on SGI machines. In 2000, Effect was ported to Linux by Michael Boyles (of Indiana University's Advanced Visualization Lab). Recent efforts have included yet another port to Mac OS X by Dave Reagan (also of Indiana University's Advanced visualization Lab). Following years of successful use, Effect is being made available as freeware. Rob Shakespeare, the developers, and Indiana University present the program as is, with no support or warranty. For installation and operation instructions, see the 'setup' directory