In Lightroom 6.4 when I try to open an image that is in Library Module, in the Develop Module the image opens a, a Posterized image. How can I prevent this?
That could be due to graphics processor.
Go to Lightroom Preferences > Performance > uncheck "use graphics processor"
First thing to do is turn off the option to use the GPU. It cause more problems then it solves.
Retrieving data ...