This guide will demonstrate the process of creating a 3D anaglyph image from a single photograph. Although it may not be a cinematic 3D experience, it’s still an enjoyable activity and can lead to captivating projects! Here’s what you’ll require:
3D glasses (the type with red and cyan lenses)
This method excels with black and white images, though it also performs admirably with color ones. For this tutorial, I’ve been granted permission by my friend Mia to use one of her photos from a photo session a few months prior.
duplicate your background image twice, assigning one copy to each eye. Label one layer “Left-red” and the other “Right-cyan” to prevent confusion later in the tutorial. Once duplicated and named, deactivate the visibility of your original background layer.
We’ll adjust each new layer so that the right and left eyes perceive slightly different images. 
The magic of 3D anaglyphs lies in our natural binocular vision and depth perception. Similar to a camera, each eye captures a 2D image, but our brain combines these slightly different images to perceive depth.
This tutorial’s technique is based on isolating the color channels on each layer. Double-click the “Left-red” layer in your Layers panel.
Standard 3D anaglyph glasses have red lenses for the left eye and blue or cyan lenses for the right. By turning off the green and blue channels for the “Left-red” layer, we align with this setup. This adjustment is made in the Advanced Blending dialog.
The “Right-cyan” layer will only display the green and blue (cyan) channels through its lens, so we deactivate the red channel. 
After defining which image goes to which eye, we simulate depth by altering the perspective of each layer. Begin with the “Left-red” layer and adjust the perspective by going to Edit > Transform > Perspective.
Drag the top left corner of the image upward by 50-100 pixels, depending on the size of your image. For a more pronounced effect, drag further. 
Repeat this process on the “Right-cyan” layer, adjusting the top right corner of the image.
Once both layers have been transformed, your image should resemble the following. 
By doing this, we’ve tricked our brain into perceiving depth from two distinct images, as if processed through 3D anaglyph glasses.
Wear your 3D glasses to observe your creation.
Using the Move tool, align the two layers in the center by pressing the left and right keys on your keyboard. I used the model’s face as a reference for the midpoint. 
Crop the edges of the photo where the layers don’t align using the Rectangular Marquee tool, selecting the area you wish to retain, then going to Image > Crop. 
You can now save your image in any desired format (JPG, PNG, etc.) by going to File > Save As. You’ve successfully created a 3D anaglyph from a single photograph! 
Although this method doesn’t replicate the true 3D anaglyph effect, which requires two distinct perspectives from two separate photos, we’ve achieved a similar outcome using just one photo.
This is a straightforward technique to enhance your images with a captivating 3D effect. All that’s needed now are some 3D glasses…
