Gustavo Patow (LIFIA-UNLP) and Claudio Delrieux (ICIC - UNS), Argentina
This image was generated using the Environment Map Inversion technique, and it represents a cristal duck on top of a magazine cover. The overall approximation consists in approximating the refractions through a generic object with the refractions through a generic lens. The mentioned technique takes advantage of the fact that, for thin lenses with the Gaussian approximation and using Blinn & Newell's Environment Mapping technique, the expresions for refracting through it colapses to the ones for reflection, with an environment map inversion prepprocess step.
Artigo "On low cost refraction models", submetido ao Sibgrapi 96.