So I've noticed on dark wallpapers I can see 'fog' so I set a black wallpaper for the lockscreen. The 'fog' came up clearer. After doing some research (googling) I found the fog to be a result of the ripple effect. Once the ripple effect is off the fog disappears with it. This isn't an issue related to my S3 only, I asked a friend to try it on their S3 and the exact same thing appeared. Anyway heres a picture of it.
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