Hello,

I have noticed posterization--usually in the skies--in few of my photos after creating a vignette.

Most often I create the vignette using the rectangular marquee tool with feathering set at 250 px (I set this on or near the border of the photo, then Select>Inverse, Edit>Fill>Black>Blending Mode:Normal>Opacity: 100%. I then create a new layer, change the Blending Mode on the new layer to Overlay and adjust opacity as seems best.

(I know a vignette can be created using Filter>Lens Correction as well.)

I notice the posterization on screen and, to a degree, in prints and this happens in spite of my trying not to overdo contrast.

What am I doing wrong and how can I remedy this? Thanks for your input.

Phil
(P-J)