Faculty Advisor

Agu, Emmanuel O.


This report details the design and implementation of a realtime Global Illumination approximation for rendering leaves using Light Propagation Volumes (LPVs), simulating both reflected and transmitted diffuse light. It employs 4th degree polynomial Spherical Harmonics on separate color channels to represent the flow of light, and its complexity is independent of resolution or geometry. A Reflective Shadow Map is used to build a model of the lighting environment inside the LPV, which is then processed to propagate light through the scene. The program runs at an average of 40 FPS on modern graphics hardware and uses less than 50MB of system memory and 70MB of GPU memory, making it a viable option for realtime rendering applications.


Worcester Polytechnic Institute

Date Accepted

April 2011


Computer Science

Project Type

Major Qualifying Project



Advisor Department

Computer Science