Computer Graphics
TU Braunschweig

Eikonal Rendering: Efficient Light Transport in Refractive Objects

Eikonal Rendering: Efficient Light Transport in Refractive Objects

We present a new method for real-time rendering of sophisticated lighting effects in and around refractive objects. It enables us to realistically display refractive objects with complex material properties, such as arbitrarily varying refractive index, inhomogeneous attenuation, as well as spatially-varying anisotropic scattering and reflectance properties. User-controlled changes of lighting positions only require a few seconds of update time. Our method is based on a set of ordinary differential equations derived from the eikonal equation, the main postulate of geometric optics. This set of equations allows for fast casting of bent light rays with the complexity of a particle tracer. Based on this concept, we also propose an efficient light propagation technique using adaptive wavefront tracing. Efficient GPU implementations for our algorithmic concepts enable us to render a combination of visual effects that were previously not reproducible in real-time.

Author(s):Ivo Ihrke, Gernot Ziegler, Art Tevs, Christian Theobalt, Marcus Magnor, Hans-Peter Seidel
Published:July 2007
Type:Article in conference proceedings
Presented at:SIGGRAPH

  title = {Eikonal Rendering: Efficient Light Transport in Refractive Objects},
  author = {Ihrke, Ivo and Ziegler, Gernot and Tevs, Art and Theobalt, Christian and Magnor, Marcus and Seidel, Hans-Peter},
  booktitle = {Proc. {SIGGRAPH}},
  organization = {{ACM}},
  volume = {26},
  number = {3},
  month = {Jul},
  year = {2007}