[Macroscopic Solutions Support]

Macroscopic Solutions Support answer
This staff-authored guidance is generalized. Project-specific and private details should be handled through direct support.

Bring a broad diffuser close to the subject, keep flash positions controlled, and change the angle or shape of the illuminated area rather than simply increasing power. Watch for bright reflections from the diffuser itself. Cross-polarization can help in suitable workflows, but it may also remove surface behavior that matters scientifically, so preserve an unpolarized reference when reflectance is part of the record.