Abstract

In this paper we present Cube-map data structure for global illumination computation at interactive rates. Our algorithm computes global illumination by iterative computation of irradiance from multiple bounces. Emission from light source is simulated using the direct lighting capability of the GPU. Light bouncing out of surfaces of the scene are captured in cube-maps distributed over the volume of the scene. Subsequent bounces are simulated by querying the cube-map data structure and ambient lighting capability of the GPU based rendere. We are able to compute plausible approximation of indirect light for static and dynamic scenes involving both moving objects and changing light sources. The accuracy of our solution can progressively improve as computation time is increased.

Citations