I took a whole series of portraits (like 100 keepers) at my church and only had one speedlight and no gels, so my backdrop is yellowish in all of them. What is the best way to process these so the background is uniform (and, presumably, pure white), using either Lightroom or Photoshop?
Here’s a sample photo. You can see I’m shooting with fill from an umbrella just to my right, so the backdrop tint gets yellower and darker to the left.
