Sky Replacement problem

The reason is probaby that one wants to be able to move the sky a bit to get the best composition.

Oh dear, I was hoping to avoid having to explain what was being this..

First of all its the same shot with the exposure adjusted in Photoshop, not two pictures. The reason for not having a different sky is to do with being able to see the aircraft propellers. If I adjust the picture settings to get the underexposed aircraft the propellers, which are blurred, become very faint and tend to disappear when a replacement sky is added so I adjust the one to be used to act as sky, which is overexposed and featureless, to show some cloud texture. This causes the aircraft and its propellers to become darker. When that version is used as the replacement sky the aircraft is hidden by the correctly exposed version but the propellers are now visible.

I appreciate that there may be other ways around my problem but I am not sufficiently familiar with Photoshop to make use of them at the moment and my method seemed to offer a good way of dealing with the problem but I was thwarted by Photoshop increasing the dimensions of the replacement sky and I wondered what was the reason for this as I cannot see one.

John

You are making things unnecessarily complicated. Shoot the sky without any aircraft in it.

Hello, if I understand, the plane has moved between the two shots, unless your bracketing is very fast...

I am wondering if erasing the plane on the correct sky, with the patch tool, would not be a step to add, and if the sky replacement tool is the correct job, you might just stack the images, select sky and use a blending mode to correct the sky...