On 3/13/2016 12:15 AM, StephenS wrote:
> ....
>> Do you mean I should separate the cameras by 1
>> unit for every 25 units of distance from the target?
> ....
> Yes
> The pictures reminds me of to much offset (10 to 1?).
> Although there maybe other ways to get this effect.
>
> You are using converging lines, fixed look_at.
> I use parallel lines for my work, same viewing plane.
> A different 'rule of thumb' may be needed.
This whole thing has been confusing me for some time.
To my mind.
It is obvious that the natural way of creating Stereographic images
should be to use a toe in or convergence. But doing that can create a
keystone effect. Using parallel cameras is ideal for the background but
that should, by my reading, put everything in front of the screen, when
viewed. Using a toe in you define the plane of the screen being at the
look_at point.
To correct the keystone effect you could crop the images.
My rule of thumb is to have the cameras separated by the distance
between your eyes in Pov units. About 2 to 3 units if your scale is 1
unit per inch.
Having said that I still cannot make up my mind which is the best way to
do it. It is not helped by using shutter glasses. The software that
displays the Stereographic images allows me to adjust the separation or
alignment. I created an animation where I moved the Look_at point from
foreground to background. The effect is like a zoom.
Here are a couple of images with the Look_at at the female model.
> I'm happy with my 3d effect, although not always with the subject matter
> ;-)
>
You're just fishing for complements. :-P
Your images are peerless. :-)
--
Regards
Stephen
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