layers

Hi, I'm an avid amateur photographer and photoshop enthusiast but not very experienced. I have a D500 and was experimenting with the "Multiple exposures" option in the camera that allows you to combine multiple pictures automatically. I was using this feature in preparation of a photoshoot...

I have been trying to figure out a way to remove the smudges and dirt from the bottom of pictures. Particularly where people have walked on the white background, and left footprints. I attached an example for a better idea. The simple solution would be to put down a clean piece of backdrop, but...