In zip file you find:
– One 4096×2048 32bit HDRI .hdr fully spherical map
– One 8192×4096 8bit LDR .jpg fully spherical map
– One 512×256 32bit HDRI .hdr light map
– 15 Backplate images .jpg containing a reference object for easier camera matching
– sIBL description file
What is sIBL?
It’s a short for “Smart IBL ” . It’s a standard describing all informations and files needeed to provide fast and easy Image Based Lighting Setup.
sIBL-Gui is a free application for organizing your HDR images and setting up your scenes with a single click.
But you are not required to use sIBL-GUI to use these files. You can also set up you scenes as usual.