WOW. Just got an update from the developer directly(this is astonishing customer service esp. since I WAS still on a demo lic. at the time)
It allows for erasing the black opaque alpha mask pixels at the same time you remove the scenery above your horizon. or you can erase the black opaque pixels in the alpa channel to create more transparency or add black pixels to obsure more sky sperately.
Really nice. Highly recommended for Mac users. Now I just need some warm, clear weather to go out on the gulf and take some photos.
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