ImageBasedLighting

From Odwiki

Image Based Lighting is the technique of lighting objects in a scene based on the radiance described in an image, typically an EnvironmentMap.

[edit] Techniques

• LightDome - a Light Dome is an array of regular lights generated from the value in the environment map to match the intensity and direction of the incident light.
• A sphere can be created and the environment applied as a texturemap and now, using GlobalIllumination irradiance, the light energy can be transferred as secondary illumination. This probably a slowest-but-most-technically-correct method to do this. Usually you will run into limitations of whichever renderer you're using here (eg. no 2nd-bounce light, slow rendering, etc).
• SphericalHarmonics