Action: Invert LAB > L overlay Duplicate first document Name: “Apply Invert LAB to L -Overlay” Flatten Image Convert Mode To: Lab color mode With Flatten Image Size Width: 400 pixels Height: 300 pixels Interpolation: bicubic Canvas Size Width: 1204 pixels Horizontal: left Set Selection To: rectangle Top: 0 pixels Left: 0 pixels Bottom: 300 pixels Right: 400 pixels Copy Paste Anti-alias: none Set current layer To: layer Name: “a>L” Select lightness channel Show a channel, b channel Apply Image With: calculation Source: a channel of merged layer With Invert Source Calculation: overlay With Preserve Transparency Hide current layer Select Background Set Selection To: rectangle Top: 0 pixels Left: 0 pixels Bottom: 300 pixels Right: 400 pixels Copy Paste Anti-alias: none Set current layer To: layer Name: “b>L” Select lightness channel Show a channel, b channel Apply Image With: calculation Source: b channel of merged layer With Invert Source Calculation: overlay With Preserve Transparency Hide current layer Select Background Select lightness channel Show a channel, b channel Apply Image With: calculation Source: current channel of merged layer With Invert Source Calculation: overlay With Preserve Transparency Show layer “b>L” Select layer “b>L” Move current layer To: 805 pixels, 1 pixels Select layer “a>L” Move current layer To: 403 pixels, 1 pixels Flatten Image