Correction for light falloff (uneven light distribution)

[Fleiz-Eiz]

The CHI video "How to Use RelightLab v1.2.5 to Build Reflectance Transformation Images" (2nd slide at 21+ seconds at https://forums.culturalheritageimaging.org/topic/4113-relightlab-guideline/) indicates there's a correction for light fall-off in the ReLightLab software (now v2024.1). Is this correction automatically applied, or is there an option to enable it? What algorithm is used for this correction?

I've applied an empirical correction for light fall-off in Matlab by capturing neutral gray cards in a light-array dome, but the corrections are only valid for an identical dome geometry and setup. A mathematical correction for different light positions and setups would be a very useful feature in ReLightLab.