@INPROCEEDINGS{Papa09,
  author = {Charilaos Papadopoulos and Georgios Papaioannou},
  title = {Realistic Real-time Underwater Caustics and Godrays},
  BOOKTITLE =    {Proc. GraphiCon '09},
  YEAR =         {2009},
  pages =        {89 -- 95},
}