Photoshop How-To: Clone Yourself!
Photoshop
So how do we turn six images of the same person into one? To make things simple, we’ll focus only on two images at first. Open your first two images in Photoshop. They will be separated by tabs on the upper left hand corner.
On the second image (the one where you're slightly to the right of your original self) go to 'Edit' and 'Select All' (Ctrl+A). You’ll know the image is selected when a large square is sketched around the photo. With the image selected, go to 'Edit' then 'Copy' (Ctrl+C). Now switch back over to your original image. Click 'Edit' then 'Paste' (Ctrl+V). You have now pasted your second image directly on top of your first one. In other words, you have successfully created two separate layers.

Direct your attention to your ‘layers tab’ located at the bottom right corner of your screen. You should see both images, one on top of the other. When photos begin stacking on top of one another, they become layers. The top layer, in this instance, is the only visible layer. The layer below is almost identical to the one above it; the only difference is that ‘you’ are standing in a different place. Keep in mind that all six images you shot have an identical backdrop, because your camera never moved. Your location in relation to that backdrop is what should change from image to image. Grab the eraser tool, and make sure your top layer is selected.
Above: The eraser tool
Below: Select the top layer
Begin brushing the eraser along the left side of the image, where ‘you are’ in the picture underneath. If you forgot where you are in the picture below, simply click the ‘eye’ on the top layer to make it disappear. Once you see yourself below, click the eye icon again to erase yourself in.
Keep erasing until your new clone is fully visible. Since the back ground below is exactly the same as it is above, you don't have to worry about erasing too much.
Now it’s time to combine these two layers into one solid picture. Remember your layers tab? Right click one of your layers and scroll down to “Merge Visible”.
Congratulations! You now have two identical versions of ‘you’ in a single photograph! Repeating the process is simply a matter of copying additional images and ‘erasing’ yourself in again, but just to be on the safe side, we’ll go through bringing in your third clone.
So now, we have a single layered picture, with two clones.
Open another image of yourself in Photoshop. Once again, you will have two tabs.
Click over to the right tab (or whichever image only has a single person in it) and repeat the prior steps. Hit Ctrl+A to select the image, then hit Ctrl+C to copy the image. Click over to your original image and hit Ctrl+V to paste over it. Now, just like before, you have to ‘erase’ the two copies of yourself back into the photo.
Keep erasing until all three of your clones appear in the image. Then, just like before, right click on the top layer and click on ‘merge visible’. You now have a single image populated with three clones.
You can repeat these steps to add as many clones as you’d like, just so long as they don’t overlap with one another. After adding all six of my clones into the image and added a simple monochrome filter I came away with this: