This tutorial teaches you to blend two images together to form a single image with a perfect blend.
Step 1: Open two images in photoshop. One a background(img1), and another, the foreground (img2). Make sure that both images are almost the same size, if not, resize.
Step 2: Ctrl+A (select all) on the Img2 and ctrl+C (copy). then select img1 and ctrl+v (or paste).
Step 3: Select the "move tool" (or press v on the keyboard). Move your image to reveal half background or wherever you want it to be.
Step 4: Select the Rectangular Marquee tool. Then in the options bar on top, give it a feather radius (about 50-60 pixels for an image of size 1024X768). The feather depends on your image size, the bigger the image, the more feather.
Step 5: Then, do a selection right where the borders on the two images are. Press "del" on the keyboard. If you find there is a trace of both images not blending, just move the marquee around and press del again.
Step 6: In the layers pallette, just change the blend mode of your layer1 to see what fits best. Different blend modes give different effects. I used the Luminousity blend.
Here is my final image:
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