Now paste Shrek’s head in this document. I renamed this Layer 'Shrek Face'.
The size of Shrek’s head doesn’t match the shoulder width of Silver Surfer. Set both scales to 110%.
Move the head so that the jawlines of both faces match.
Next step: Desaturate Shrek’s head. We do this to be able to apply the colors we want to it. You should now be left with a black and white image of the head.
Apply Color
To apply a new color to the head, first select the eyedropper tool and choose a light color from Silver Surfer’s body (Don’t take the lightest color, like the highlights, take it just outside of them). Make this color the foreground. Next choose a dark color (again don’t choose the darkest color, but something very close). Go to Image>adjustment>gradient map. You should see this window:
Click on the gradient color and a second window will appear. Add a new Color Stop, click underneath the bar (where my middle Color Stop is). You can change the colors of the Color Stop by double clicking on them. The middle one need to be lighter than the darkest color to the right. Now move the middle Stop until you are satisfied with the color of the head.
Smoothing the Head.
Shrek’s got a textured skin, eyebrows etc whereas Silver Surfer’s face is smooth. To smoothen Shrek’s face, we’ll use the smudge tool. I set the strength of the tool to 55% and smoothed the surface, following the contour of the face features. You should get something similar to the pic below.
