If I make a section with the marquee tool, and then Select > feather 100 px, I get a smooth rectangular gradient.
If I use the same Marquee selection, preceded by feathering in the Options Bar, I get an oval selection reflecting the feathering.
I observe the feathering by creating a layer mask, or by dragging the selected Layer into another document.
Why is the feathering different?
Thanks very much,
Mac 10.7.5, PSCS6
BTW, I was doing this little experiment on a Background Layer.
I don't know if they would be exactly the same, but it should be a close enough match that a casual glance wouldn't see the difference.
What size is your rectangular marquee selection?
Could you post some screenshots with the steps in each case?
There is no difference between using the feather input at top of screen, and feathering after making an un-feathered selection.
Thanks for jumping in to help. I am not sure what I was doing to get different results!!! Works fine now.