Spectral rendering of interference phenomena caused by multilayer films under global illumination environment

Abstract

Interference phenomena caused by multilayer films generates beautiful scenery. When rendering the phenomena in computer graphics, we should take into account both spectral distributions and global illumination. The paper proposes a method for rendering optical phenomena caused by multilayer films based on wave optics under global illumination environment. The method is an extension of a multilayer-film model, where the traditional model is based on a local illumination model and has limitations of rendering a scene with caustics and inter-reflection of light. In the proposed method, the multilayer-film model is reconstructed taking into account global light transport to render optical phenomena caused by interference of light under global illumination environment.