Real-time rendering imposes the challenging task of creating a new rendering of an input scene at least 60 times per second. Although computer graphics hardware has made staggering advances in terms of speed and freedom of programmability in recent years, there still exists a number of algorithms that are just too expensive to be calculated in this time budget, like for instance exact shadows or an exact global illumination solution. One way to circumvent this hard time limit is to capitalize on temporal coherence to formulate algorithms incremental in time. To this end, three algorithms...