LuxRender is a state-of-the-art, physically based renderer with a lot of goodies. With the developments, I try to help as much as I can. To see what our incredible artists are up to, take a look at the gallery!
A non-official LuxRender scene repository is also hosted here, check it out! And this is how the individual scenes look like on our wiki. You can use any of these scenes in your research paper, and please make sure to give credit to the artist(s) shown in the author.txt file.