Radiosity and realistic image synthesis
Radiosity and realistic image synthesis
The light volume: an aid to rendering complex environments
Proceedings of the eurographics workshop on Rendering techniques '96
An improved illumination model for shaded display
Communications of the ACM
Journal of Graphics Tools
IEEE Computer Graphics and Applications
Light mesh: soft shadows as interpolation of visibility
Future Generation Computer Systems - Special issue: Computer graphics and geometric modeling
Light mesh: soft shadows as interpolation of visibility
Future Generation Computer Systems
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The given paper is devoted to the application of the original approach of Light Meshes to the recursive ray tracing algorithm. It is a sort of a simulation of a solution for the global illumination problem. It consumes not so much extra computational time and, nevertheless, allows: a) to speedup a process of shadow calculations, b) to build soft shadows, c) to simulate main effects of diffiuse interreflections, d) to omit the ambient term. In order to obtain the goals listed above we introduce the notion of space light meshes. A light mesh is a point set (mesh points) in 3D space of a scene. At each mesh point we compute illuminance, which characterizes some kind of "light field intensity" in the scene. Then important part of resulting illumination of a scene object point (object point) is obtained via interpolation of stored values of nearby mesh points. Our experiments show that the suggested approach reduces computational time with respect to ray tracing algorithm if a scene contains a lot of light sources and/or an image has a large resolution.