These scenes are the glossy Cornel box scenes used for Figure 4 and Figure 5 in "Stochastic Progressive Photon Mapping" by Hachisuka et al. SIGGRAPH Asia 2009, and were modeled by Toshiya Hachisuka.

Permission to use the model/scene for non-commercial purposes is granted as long as proper credit is given. For example, put "The glossy Cornel box scenes in Figure X are from Hackisuka et al. [2009] and were modeled by Toshiya Hachisuka." in the acknowledgement section of your paper.