I was trying to say 3-D as in 3D theater, 3D television or three-dimensional view of things on our flat screens.
In still pictures there are several ways of achieving this effect although I don't exactly know how many. I'll share some of my shots that I think are somewhat close to what is perceived as three dimension by our eyes. Kindly note that they are no where near the fine quality products of the pros but, well, I tried.
One way is via lighting. Lighting the subjects at different focal distances will give you the feeling that one subject is further away from you than the other.
|Piranhas in a big aquarium|
|Sad looking Snake confined in a glass cage|
Another way is via depth of field (DOF). Shallow depth of field combined with focusing only the front-most subject can create 3D effect, such as these photos:
|'Beruang ' is one of the favourite dogs at Mom's|
|'also-in' - a typical unwanted weed in your flower vase|