During the color grading in this tutorial, the author very cleverly copied a channel of the Lab channel to the RGB layer and appropriately changed the layer opacity. This has unexpected effects.
Original picture
final effect
2. Stamp the layer (Ctrl + Alt + Shift + E), go to Lab mode (Image > Mode > Lab Color), select Flatten, click on the Channel panel, select the brightness channel, Ctrl+A to select all, Ctrl+C Copy, go back to the step before Lab color in the history, that is, the step of stamping the layer. Return to the layer panel, create a new layer and press Ctrl+V to paste it, and then change the layer opacity to 70%. The effect is as follows picture.
