OpenGL API-based Code - Detail Listing

OpenGL-rendering of Underwater Caustics

Mark Kilgard

/resources/code/samples/mjktips/caustics/

Light hitting the rippling surface of the water creates focusing effects or "caustics" on underwater surfaces (such as the walls of a pool). These effects are straightforward to generate using a second blended rendering pass with OpenGL's texture coordinate generation functionality and some caustic texture patterns