Geometrical Theory of Diffraction for
Computer Graphics

Geometrical Theory of Diffraction (GTD) is an extension of geometrical optics aimed at taking into account diffraction.
We use that theory to take into account diffraction effects in computer graphics photorealistic rendering.
In particular we simulate complex reflectance functions from surfaces acting as diffraction gratings.
GTD can be implemented in a ray tracing framework allowing to treat complex situations that could not be handled
by previous related work.


Example microgeometry 1 directional light normal to the CD surface/ diffracted component only  

Related publications

A geometrical approach to modeling reflectance functions of diffracting surfaces.   N. Tsingos
submitted to the 11th Eurographics Workshop on Rendering 2000.