So, I’m not going to go through the ENTIRE process for doing this, but I’m giving you enough to get started. This can be used to swap heads or to add people/things to photos that weren’t originally there. This will show you how to get it started. The last part that I won’t show is adjusting the color, lighting, etc to make it match the current photo. If you want lessons, let me know.
Step 1: Find 2 photos that you want to use. If swapping heads, try to find a head that is positioned similar to the head already on the body you want to use. It’s a plus if the lighting is similar. Open both in Photoshop.
Step 2: Preparing the head. Add a new layer to the photo you will be decapitating. Then, on the toolbar on the far left, click the very bottom button. It just looks like a circle. Then, select the paintbrush tool. Paint over the face. It will always be red. Don’t worry about that. If you accidentally go outside the lines that you want, that’s fine. Just make sure you get the whole face. Once you do, then you can go back and select the eraser tool, zoom in and make final adjustments so that the red is perfectly covering the face to the jaw line (unless you want to include the neck).
Step 3: Removing the head. Go back to the circle button that you first clicked. Click it again. This will make a dotted line around the outside of the picture, and around the area that you just painted. Now click “Select” and “Inverse” at the top. This will change the selection so that it is now only the head. In the other image, create a new layer. Click the painted head and drag it over to the other image.
In this case, the picture of Ryan was much bigger than the small photo of Lady GaGa that I found online.
To correct this, hold down Command+T (on a PC I think it’s Control). While holding down the Shift key, drag one of the corners so that it approximately the same size as the other face. When finished, hit Enter. Drag the face over the other one.
Step 5: The tricky part. Create another layer. While this layer is selected, select the paintbrush and a bright color. Use a very small brush to put a dot on the inside and outside corners of each eye.
Turn the opacity on the “Ryan” layer so that you can see both faces.
Line up the dots with the corners of Lady Gaga’s eyes. You may need to use Command+T again to resize it. You can also use this to rotate the face by looking for the curved arrow.
Next, use the eraser to erase over where you see the original image through the new image. You can now see that Lady Gaga’s hair is visible over Ryan’s forehead.
In this picture, you can still see her ear and some face where Ryan’s didn’t cover it because is face is longer. To remedy this, turn the opacity on Ryan’s face back up to 100% and use the Clone tool (looks like a stamp).
Hold down Alt and click on the hair. Then draw over the ear and face to put hair there. Adjust as need be to make it look like it was there to begin with.
Now you’ve swapped heads! I will end the tutorial there. Once you have this down, you will have to get into Layer Masks to adjust the color of the face so that it matches everything else. As you know, Ryan is much redder than Lady GaGa, so I had to adjust the brightness, saturation, and then paint over his face at a low opacity by selecting a color of her underarm. Tada!