I'm taking a series of images on a 360 turntable. Camera settings and light settings remain identical throughout. In LR I'm taking the first image, altering the exposure slightly and then use the graduated filter and range mask to give an all white background. First image looks great. Select it then the others in the sequence and sync all settings. Sadly the range mask settings are not being set across the images meaning sometimes one or two need re-adjusting sometimes its every single image .... Surely this should just work? The image I'm using is actually a cylinder it stays in the same place, its even the same darn colour. The filter is in place but doesn't appear to work unless you adjust it and the shadows it creates are blocky artefacts. Brand new iMac so that shouldn't be the issue.