Blending images in itself isn’t difficult, but it does take time and effort. The most important thing to check for is straight edges of images that look out of place and need blending further.
Collect images you want to use for your blend. I usually get 5 or 6 together and then search for more when I need them. It’s really important that the images are roughly the same size when you’re a beginner to blending as it will be much easier to make the background blend well. If they aren’t the same size, resize them or pick different images.
Go to File > New, and create a new image. The height needs to be the same height or bigger than your photos. The width needs to allow for all your photos, but remember there is no set limit, and some parts of images will be overlapping so it doesn’t have to be huge.
Select the pic you want in your background, and paste it onto your new, blank image as a ‘New Layer’. The pic you choose should preferably be a close up of a person’s face. It doesn’t matter where you put it on your image.
Once you’ve positioned it using , choose your next image and place so it slightly overlaps. Here’s mine:
Now go to Masks > New > From Image, make sure the ‘Source Opacity’ circle is checked and click ‘Ok’.
Click , and make the size of your eraser huge and the opacity about 50% (if the Tool Options box isn’t up, right click and select ‘Tool Options).
Now erase over your image, blending the edges of the top picture with the one underneath. Use the left mouse button to erase the top image, and the right mouse button to replace the top image until you get an effect you like. Make sure there are no obvious horizontal/vertical lines left across your image. Zoom in on your image or change the size/opacity of the eraser if you need to.
Work across your image, repeating steps 4-7.
Once you’ve finished, copy your finished image and paste it as a new image, then save. A .jpg or .png would probably look best.
Mine’s below, it’s not that great because I should’ve added a few more images to it. But you get the general idea, right?
Additionally, spice up your blend by using my other tutorials. You can add techniques to your images before or after you blend them for a more interesting look.