more? moor-ray? mor-uh? I'm not sure how to pronounce it, but it's a pretty common problem with a simple fix.
What is moire? According to Photography Life (https://photographylife.com/what-is-moire) "Moiré pattern occurs when a scene or an object that is being photographed contains repetitive details (such as lines, dots, etc) that exceed sensor resolution."
It can be a little scary to come home from your session and excitedly download your images only to realize the subject's clothes have a crazy rainbow pattern on them! When I first encountered this problem, I tried to blend, blur, and desaturate away the lines with messy results. Then, I discovered that Lightroom actually has a tool specifically for this purpose!
Fear no more! It's a quick and easy fix!