3D Mars: making anaglyphs

How does 3D work? 

3D (three-dimensional) means that an object has width, height, and depth. On the contrary, a 2D object does not have depth and thus is flat, just like a sheet of paper.
Because our eyes are spaced apart, each eye sees the same 2D view, but from a slightly different perspective. The brain puts the 2D image from each eye together, giving us a 3D view of the world. That is, we can perceive depth.

Making anaglyphs

We can create a 3D image by superimposing two 2D images. It is called anaglyph, and this picture simulate the way our eyes work. Making an anaglyph is so simple that anybody with a camera, computer equipped with photo-editing software, and a pair of tinted glasses can make their own 3-D pictures of Mars, family members, pets…
In an anaglyph, the same 2D picture is overlapped, but spaced slightly apart. One of the overlapped images is colored cyan, and one red. We can achieve this by using two cameras side by side, or only one and moving its position horizontally. With the help of the software Anaglyph Maker we will get our 3D pictures.
When we look an anaglyph with 3D glasses, the lenses only allow the red image to enter the left eye and the cyan image to enter the right eye. The visual cortex of our brain fuses the two images, and we perceive the image in 3D.

Making 3D glasses

Take the template, cut out the glasses, including the holes for the eyes. Cut one cyan-color cellophane and one red-color cellophane. The two pieces will cover the eyeholes in the glasses. Glue the cellophane on the inside of the glasses. Place the red cellphane on the left eye and the cyan cellophane on the right eye (left and right when the glasses are on our face).