Posterisation seems to be becoming more apparent now on the images. I don't know why. At first, I thought it was the 5K on my iMac, but now I see more people, are seeing it on non iMac monitors. Is it because of the new larger image size, I don't really know.. I would love to know how to prevent it. I have tried several ways, but to no avail, apart from cloning it out. It always appears on the BG for some unknown reason. Any Thoughts?

Will