Is OpenGL capable of generating stereographs? I mean like those pictures that look nonsense at first, but if you force your eyes to look at a point behind the plane of the picture you will see a perfect 3D object. I made once a simple engine to generate such picture. It worked, but it was too simple to generate complex scenes. And so, I tried to use z-buffers in OpenGL, but they seem not to reflect the real depth of the points of the rendered objects. Any idea?