Have a look at this video .
When applying a vignette, I get this strange ghosting flicker (look at the top of the tower). Any ideas?
Lightroom 2105 cc (fully updated)
Macbook Pro July 2015
Processor - 2.5 GHz Intel Core i7
RAM - 16 GB 1600 MHz DDR3
Fresh reboot and no other programs running except PS cc 2015
Checked the video.
Is that happening with every image ?
If you toggle the GPU usage on/off, does the problem still happen?