Procedure
More and more specialized algorithms are used in 3D programs that can effectively simulate the global illumination. These algorithms are numerical approximations to the rendering equation. Well known algorithms for computing global illumination include path tracing, photon mapping and radiosity. The following approaches can be distinguished here:
- Inversion:
- is not applied in practice
- Expansion:
- bi-directional approach: Photon mapping + Distributed ray tracing, Bi-directional path tracing, Metropolis light transport
- Iteration:
- Radiosity
In Light path notation global lighting the paths of the type L (D | S) corresponds * E.
Read more about this topic: Global Illumination