False God

[ChantalFournier]

In some 3d software, it's possible to zoom the camera without moving it OR to move it closer without zooming.
Here is the explanation according to the Maya Help file:

Dolly

Moves the camera into the view, or backs the camera out of the view. When you use the Dolly tool, you change the perspective; that is, objects far from the camera change in relative size at a slower rate than objects which are close to the camera. Compare to Zoom (see Zoom ).

You can use the Dolly tool in a perspective view or an orthographic view.


Zoom

Changes the focal length (viewing angle) on the camera. The Zoom tool does not change perspective like the Dolly tool does; all objects in the frame change size at the same rate. The camera doesn’t move, but the effect is similar. To move in or out of the view without changing the viewing angle, see Dolly.

Ok, I'm not a 3d rendering specialist, but here's my hypothesis:
The results are different, the closer you are from the foreground, the more distorted the perspective in the background becomes. If you don't know how to do it with the software you are using, I suggest reseting the camera back or creating a new one, then placing the camera at the same angle but further away. Then render your image bigger and crop in. You should have a more natural looking set of columns.