Offline 3DGeek

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Question about perspective.
« on: May 18, 2017, 12:52:05 PM »
So I was reading in the Wiki about the FE "perspective effect" - as shown in this diagram:

It's an interesting concept.

It says (in effect) that perspective isn't a "symmetrical" effect - it forces things downwards toward the horizon with increasing distance - right?   I say not "symmetrical" because it evidently doesn't push things that are below the horizon upwards.

Then we're told that this is a defect of human vision - but that can't be the cause because cameras produce the same effects...so perhaps cameras have the same effect built into them so they take "natural" looking photos?

Trouble with that is that if I turn my camera upside down and take a photo - the same effect happens - the depression happens downwards.

For that to be the case, then this has to be caused by the Earth/Atmosphere - and not by the camera/eye.

So I think the Wiki could use some correction here.


Re: Question about perspective.
« Reply #1 on: May 23, 2017, 09:22:15 PM »
Perspective only happens inside eye or camera. It does not happen out in the scene being viewed which is the faulty assumption in that diagram. Nothing is actually forced down to the horizon out in the world we are viewing, and so the idea that perspective could hide something behind the earth that is actually located up in the sky is completely incorrect.

Here is a video that explains it pretty well:


« Last Edit: May 23, 2017, 10:34:18 PM by Nirmala »

Offline 3DGeek

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Re: Question about perspective.
« Reply #2 on: May 24, 2017, 07:35:47 PM »
Yes, I know.   I'm hoping someone in the FE world will explain why their diagram is wrong.