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Old 03-09-2009, 08:39 PM
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Quark (Trevor)
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Join Date: Apr 2008
Location: Broken Hill NSW Australia
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Originally Posted by iceman View Post
Here's how I do it:

On your "Moon aligned" image, change the selection type from square to circle, and set a feather of 2 pixels.

Select an area a few pixels larger than the moon, and ctrl-C (copy).

Then just paste that selection over your "feature-aligned" image. It will be pasted as a new layer.

Then just use the move tool to move it in place over the moon. I just use the arrow keys, and use the "eye icon" to "blink" the layer on and off to be sure you've aligned the "aligned-moon selection" correctly over the old-moon.

It's the feather that will ensure you don't get hard lines or edges when it's pasted over the top.

Let me know if you get stuck and i'll post some screenshots.
Mike, have just successfully followed your instructions and got a great result, this is something I should have learned to do a long time ago.
Love the way the copied section disappears by clicking on the eye icon and just how accurately the copy can be placed using the arrows.

Have attached some examples from Aug 31st with Io and its shadow aligned.

Thanks again for your help, I really do appreciate it.

Attached Thumbnails
Click for full-size image (j2009-08-31_12-55_rgb_tbaA.jpg)
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Click for full-size image (j2009-08-31_13-15_rgb_tbaA.jpg)
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Click for full-size image (j2009-08-31_13-48_rgb_tbaA.jpg)
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Click for full-size image (j2009-08-31_14-21_rgb_tbaA.jpg)
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