Two or more pictures are often called synthetic photographs. Here's a seven-step rule for creating a picture of this kind that helps you create a simple composite picture.
I. Camera settings
First, you have to use a tripod to make sure that each frame is the same as the photo frame. Second, in order to make the photo easier to handle, you'd better shoot with a manual file. At the same time, make every frame photo exposure index the same as possible.
Two. Multiple shots
After you set up your camera, you need to shoot as many photos as you need. Because when you take the camera and the tripod away, it's hard to get back to the original point exactly.
Three. Open the image
If you're shooting in raw mode, be sure to use the same processing settings to open the image and use layers of software like Photoshop and GIMP to handle it.
Four. Create layers
Select a picture as the basic diagram of the composite photo. Put all the layers you need on top of this basic diagram.
Five. Add masks
Add masks on each layer except the base diagram, and set the masks to black so you can't see the layers and see only the basic diagram.
Six. Synthetic photos
Now you can go back to each layer and use a white brush to paint the parts that you want it to appear. This can be understood as adding on these layers, or subtraction on the base diagram. If you want to see the work layer as it is, hold down SHIFT and click the mask to temporarily disable the mask and show the layer as it is.
Seven. Final processing
If the synthesized image is satisfactory to you, you can save it or continue processing it in Photoshop. Any adjustments made on top of the composite layer will apply to the entire composite image.