Another issue is how a sensor or film responds to different kinds fabrics under different types of lighting. I remember years ago when the Navy introduced their new synthetic material khakis and under strobe flashes, they took on a subtle, but distinct purple tinge. Especially when you are dealing with discontinuous spectrum lamps such as fluorescents, different fabrics just look different colors. And how can we ever forget bubble knit blouses, which were rendered almost transparent under some strobe lighting! The best practice is to shoot raw and to try to adjust in post processing.