Link to candlestick if you haven't seen it before.
Photoshop or some photo editing software.
A front and side view photo of target.
It takes about 20 to 45 min to make.
and one facing 90° from the camera. (image 2)
Open both photos into one Photoshop file. (image 3)
With the side view layer selected use the quick selection tool to clear the back ground. (image 4)
Use the transform tool to adjust the size of the heads to match. (image 5)
I made the side head a little bigger.
Line up the noses and mouths. (image 6)
Press and hold "Ctrl" and click the side view layer. It should put a dotted line around the side view head. (image 6)
Select the front veiw layer and press the mask button.
Turn off the side view layer. (image 7)
Should look like image 8.
Adjust the mask by using the paint bush with black(to add to the mask) or white (to remove from the mask).
The final mask should look like image 9.
I made 2 versions of this image.
Version 1 is easier, faster, and doesn't make changes to the image. It uses shadows to change the eye. (go to step 2)
Version 2 changes the eye of the front view to the side view. (go to step 3)