Year: 2011
Type: article
Abstract: The antiradiance method, a variant of radiosity, allows the computation of global illumination solutions without determining\nvisibility between surface patches explicitly, unlike the original radiosity method. However, this method creates excessively\nmany links between patches, since virtually all elements exchange positive and negative energy whose interplay replaces the\nvisibility tests. In this paper we study how and if explicit visibility information can be recovered only by analyzing the link mesh\nto identify chains of links whose light transport cancels out. We describe heuristics to reduce the number of links by extracting\nvisibility information, still without resorting to explicit visibility tests, e.g. using ray casting, and use that in combination with\nthe remaining implicit visibility information for rendering. Further, to prevent the link mesh from growing excessively in large\nscenes in the beginning, we also propose a simple means to let graphic artists define blocking planes as a way to support\nour algorithm with coarse explicit visibility information. Lastly, we propose a simple yet efficient image-space approach for\ndisplaying radiosity solutions without any meshing for interpolation.
Authors: Gregor Mückl, Carsten Dachsbacher
Institution: Karlsruhe Institute of Technology
Language: English
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
Awards: G1228031897, G1392872459, G523492319
OpenAlex ID: W2407029550