Why have the backgrounds been retouched to solid black on the Neutral and Gel set-ups?
In both these situations the HDRI files were derived from using a blacked out studio. The scans were sensitive enough to capture a lot extraneous details such as leads and the brickwork right into the corners on the room. After testing the files on 3D reflective objects, however, this ambient lighting was found not to contribute to the reflections even after boosting the intensity of the files above 2000%. Removing this redundant data gave a cleaner look when used with Maya and the files compress more efficiently.
