Authors:
Daniel Bischoff
;
Tobias Schwandt
and
Wolfgang Broll
Affiliation:
Ilmenau University of Technology, Germany
Keyword(s):
Global Illumination, Indirect Lighting, Real–time Rendering, Bidirectional Reflective Shadow Maps, Open World.
Related
Ontology
Subjects/Areas/Topics:
Computer Vision, Visualization and Computer Graphics
;
Lighting and Appearance
;
Real-Time Rendering
;
Rendering
;
Rendering Algorithms
;
Shadows, Translucency and Visibility
Abstract:
The complexity of offline and real–time rendering of global illumination effects is a vast field of research.
Covering the complexity of dynamic open–world environments with changing light conditions and moving
objects is challenging in real–time rendering. Especially the quality of light properties needs to be physically
correct and sufficiently fast even if the light and environment conditions are changing. In this paper, we
present a fast global illumination approach suitable to achieve indirect lighting using high–resolution reflective
shadow maps in real time. Based on LightSkin, we present an enhancement applying bidirectional shadow
maps to improve the quality of shadows and global illumination effects in open–world environments. A
novel combination of accumulating virtual area lights from the reflective shadow map with an indirect light
representation using LightSkin’s proxy light sources shows a significant improvement. In an urban scene
typical for open–world environments,
the proposed approach is up to approx. 12 times faster than the original
LightSkin approach. This makes our novel approach suitable for high–quality indoor as well as outdoor global
illumination.
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