I have a wrinkly/uneven paper backdrop, Ive used frequency separation to apply a gaussian blur to smooth the background. On doing this, i'm getting banding. Ive tried adding 1% noise, added 50% gray layer but still banding. Ive even tried to replace the whole background with a gradient layer but I still get banding on that! Please help. I'm using a 27inch retina mac, 8 bit. The first jpeg is the banding sample, 2nd is poor. What I am doing wrong!!!