Getting a better edge on sky selection?
Windows, current version of Photoshop.
I want to replace a sky against some mountains. Sky Replacement doesn't do a very good job because it doesn't provide a sharp edge where the sky and mountains come together. Unfortunately, neither does the Select Sky. There appear to be a lot of "partially selected" pixels. If you've ever used either tool, you've probably noticed all the extraneous selection areas that make the replacement look less than perfect.
I've cleaned up the edge, so the selection edge is good. But on both sides of the edge, I have junk that shows through. What's the easiest way to get rid of all those partial selections so my mask is pure white and pure black? I've tried using fill on the mask, but because the selection isn't precise that doesn't work. How do I get rid of all the partial selection junk?
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