Action: Sky Select b ch
		Duplicate first document
		Make snapshot
			From: Current History State
			Name:  “Revert Temp”
			Using: full document
			With replace existing
		Convert Mode
			To: Lab color mode
			With Flatten
		Select b channel
		Fill
			Using: gray
			Opacity: 100%
			Mode: darken
		Invert
		Curves
			Adjustment: curves adjustment list
			curves adjustment
			Channel: current channel
			Curve: point list
			point: 128, 0
			point: 255, 255
		Set Selection
			To: all
		Copy
		Select snapshot “Revert Temp”
		Make
			New: channel
			Name:  “Sky Selection Temp”
			Color Indicates: masked areas
			Color: RGB color
			Red: 255
			Green: 0
			Blue: 0
			Opacity: 50
		Set Selection
			To: all
		Paste
			Anti-alias: none
		Set Selection
			To: none
		Delete snapshot “Revert Temp”