How to Make Classic Red/Cyan 3D Images With Any Photo
If you want to make your photo really stand out you can go the old school method of creating a 3D image by the use of Red/Cyan overlays. This process can be done with many different image editing programs, however, we will be focusing on using Adobe Photoshop. If you do not have Photoshop look inside your program for the similar tools and options.
The way this method is usually completed is by taking the same image from two separate viewing points and then combining the images together. Although this can be a good way to complete this we will be doing this process without it.
To start you will want to open your desired image inside Photoshop. Even though you can use any image you must make sure it is in RGB Color mode. You can make sure you in the correct color mode by going to the Image Menu > Mode > RGB Color. Once you have done this you will need to start the editing process by making two copies of your image by duplicating the Background layer. All in all, you should have three layers for the editing process. When you have this done select the topmost one and go into your channels dialogue box by going to the Window Menu > Channels. When you have this opened you will select the Red Channel.
Press the keyboard shortcut Ctrl + A in order to select the entire photo. At this point, your image will look like a greyscale version of your image. At this point, you will press V on your keyboard to select the move tool and move the entire Red Channel layer over to the left offsetting it from the original image. After you have offset the Red Channel layer you will want to return to RGB mode by pressing Ctrl + 2 in order to select a new layer. At this point, you are able to stop the editing process as you will see it has created a decent 3D effect. We are going to keep going with it because we are able to add much more depth to the image.
Go back into your layers panel and reselect the topmost layer in which we created the 3D effect. Create a mask for the image by right-clicking and choosing the Add Layer Mask option. Once you have one this you will need to select the brush tool and select a soft round brush in order to paint out the areas you want masking out in the topmost layer. The goal of this is to return part of the image to the original appearance. This makes it so the focus of the 3D effect is only on a certain part of the image. Only a selected are will actually pop out at you.
When you have completed this you can move onto editing the middle layer in your layer panel. Select the layer and go into the channels panel again to select the Red Channel once more. Once you have done this you will want to again select the entire image by pressing Ctrl + A and then moving one further the Free Transform by pressing Ctrl + T. What you are going to do is play with the background of the image by resizing it in any way you please. The goal is to simply make it look slightly different that it was originally. Once you have completed this last step you can accept all the edits and save your image. You should be in possession of a finely tuned 3D image.