Method for precision sunlighting simulation in virtual scene

This paper describes improvements in three-dimensional environment, a set of numerical models for the simulation of natural object (e.g. sun, cloud, light). We take into account the direct solar and simulate an animated sun in 3D environment. In this environment, we create a cloud layer hemisphere with animated procedural clouds. The scene allows the computation of some classical parameters (such as the luminance levels on a working plane, the sunlight factor), and makes it possible to get authentic and natural informative descriptors.