This rendering code accompanies the paper

CGIntrinsics: Better Intrinsic Image Decomposition through Physically-Based Rendering
Zhengqi Li and Noah Snavely
ECCV 2018

available at http://www.cs.cornell.edu/projects/cgintrinsics/.

We modified the Mitsuba rendering settings compared to the original PBRS settings. In particular, we dramatically increased the number of samples per pixel, and switched to using a bidirectional path tracing integrator.

We have included an example Mitsuba input XML file, main_template_color_rgb.xml, to illustrate these changes. This file corresponds to scene 0004d52d1aeeb8ae6de39d6bd993e992 in SUNCG/PBRS.

The script tonemap_rgbe.py can be used to tonemap a .rgbe image produced by Mitsuba using the method described in the paper. In particular, we used the following settings:

tonemap_rgbe.py --input_image foo.rgbe --output_image foo.png --percentile 90 --percentile_point 0.80