Physically Based Area Lighting Model for Real-Time Animation

Physically based rendering is not a new concept and it has been pursued in the scientific fields for a long time. However, it has not been until recently that the new generation of game consoles allowed more expensive algorithms to be adapted and computed in real-time constraints. In this paper, we analyse methods of approximating the lighting received from geometrical emitters (area lights) and compare them to the ground truth reference model computed through the Monte Carlo numerical integration algorithm.