The difference of this task with another sample is that a young man has no neck. So I must use the old man’s neck instead. But 2 models have different skins, So I need to add several Adjustment layers.
At first, make each parts;Body, Neck, Head. Body layer is made from Neck layer.
Next, Put layers in the correct order.
The important thing is the order.Body > Head > Neck layer.
If you put layers correctly, you will see like this.
Off course, the problem is the color of neck. So add Adjustment layers above Neck Layer.
In thie case, I used several adjustment layers like Selective Color, Hue/Saturation,Color Balance, Exposure, Curves, Levels.