Heidrich, Wolfgang2015-02-162015-02-1620011467-8659https://doi.org/10.1111/1467-8659.00551In recent years there has been a lot of work on interactively displaying global illumination solutions for non-diffuse environments. This is an extremely active field of research, in which a lot of different approaches have recently been proposed. In this survey, we will discuss and compare these. This will hopefully prepare the ground for systematically addressing the open questions in the future.10.1111/1467-8659.00551225-244