Action: Sky Selection Diff
		Duplicate first document
		Make snapshot
			From: Current History State
			Name:  “Revert Temp”
			Using: full document
			With replace existing
		Flatten Image
		Make adjustment layer
			Using: adjustment layer
			Mode: difference
			Type: selective color
			Method: absolute
			Color Correction: color correction list
			color correction
			Colors: cyans
			Black: 100%
			color correction
			Colors: blues
			Black: 100%
		Merge Layers
		Select blue channel
		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
		Paste
			Anti-alias: none
		Set Selection
			To: none
		Purge
			clipboard
		Delete snapshot “Revert Temp”