Light octree: global illumination fast reconstruction and realtime navigation

Vincent Vivanloc , Jean-Christophe Hoelt (1) , Coong Binh , Mathias Paulin (2)

1 IRIT - Institut de recherche en informatique de Toulouse
2 IRIT-VORTEX - Visual Objects from Reality To Expression

We present a method to rapidly build an irradiance cache based on a local illumination environment approach. This cache is obtained by a stream simplification of a photon map. The photons are K-Means clustered per voxel into sets of virtual directional light. These lights are stored into an irradiance texture to provide a real-time rendering of a global illuminated scene. This method can be integrated into an existing GPU shader to obtain complex material rendering and can be accelerated by texture atlases.

Mots clés: octree; real-time; global illumination; local illumination environment; irradiance cache

Domaines: Synthèse d'image et réalité virtuelle [cs.GR]

Vincent Vivanloc, Jean-Christophe Hoelt, Coong Binh, Mathias Paulin. Light octree: global illumination fast reconstruction and realtime navigation. Journal of WSCG, 2007, 15 (1-3), pp.41-50. ⟨hal-01518549⟩