Abstract
Precomputed Radiance Transfer ( PRT ) is a technique used to render a scene with complex light interactions precomputed. Spherical Harmonics was first chosen to represent and compress the huge precomputed data, though it can only represent low-frequency shadows and lighting efficiently. Later, with the introduction of non-linear wavelet approximation, PRT is capable of handling all-frequency shadows and lighting. While most all-frequency PRT researches are focused on direct illumination and shadowing effects, the indirect illumination part is often neglected. In this thesis, we combine the triple product integral relighting method with precomputed indirect transfer functions to better render scenes that meet real-world conditions.