Process
I started off by taking three pictures of one subject in a plain environment. One in the far right.
Here I have Uploaded the three pictures on photoshop.
↑ Here I have set the photo of the subject in the middle in the red channel of the RGB settings.
↑ Then select and copied the image in those setting.
↑ I then made a new file.
↑ I then pasted it into the red RGB channel in the new file I made. After I did the same process with the other two pictures I just made all the RGB channels visible.