## Re: [3dtv] stereoscopy rule

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• For ease of calculation I d use the 1/50 rule or for every 1 unit of camera separation the nearest object to the camera is 50 units. Ged ... [Non-text portions
Message 1 of 6 , Jan 31, 2006
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For ease of calculation I'd use the 1/50 rule or for every 1 unit of camera
separation the nearest object to the camera is 50 units.

Ged

On 01/02/06, Amala Gaura das <amalagaura@...> wrote:
>
> I am still confused. The rule is referring to placing the virtual cameras
> in a 3D program like 3dsmax or cinema4d(what I prefer). I am wondering
> how
> to measure use a rule to determine camera placements according to the
> scene.
>
> I guess my question is how do we measure the screen width to determine the
> camera separation. The screen width is looking through one of the
> cameras.
> What determines the width since the camera is looking at different places
> in
> 3D space.
>
> Also, is anyone trying out Vue Infinite for stereoscopic. It is quite an
> amazing program and now getting very interesting with the xStream plugins
> to
> work with 3dsmax & maya.
>
> Thanks for any help,
> Amala Gaura
>
> -----Original Message-----
> ________________________________________________________________________
>
> Message: 6
> Date: Tue, 31 Jan 2006 12:19:06 +0100
> From: "Sergio M Baldissara" <sergio3d@...>
> Subject: Re: stereoscopy rule
>
> > There was a post by one of our members about a 3.3% stereoscopic rule
> for
> > computer generated 3D. I am wondering if any of our members can explain
> > this further?
> >
> > What do you measure to take 3.3% of? I find that quite confusing. Do
> you
> > just put a null object at the 2 ends of the screen and find the distance
> > between them? Because looking through the camera we are looking at
> > different places in 3d space.
> >
> > I find this confusing. Can any of our members clarify this? It does
> make
> > sense that there will be a good ratio, but how to measure this since our
> > camera is looking at different places upto infinity?
> >
> > Thanks,
> > Amala Gaura
>
> That means the max on-screen distance between images of the same object
> can't be wider than 3.3% of the frame width. (According to the author of
> that theory).
> Of course it's the one with max parallax (the nearest to you while
> "shooting").
> 3.3% screen width is a pretty good separation (~1,3° parallax), but in
> "real" shooting you can use the old good 1/30th rule, meaning ~2° parallax
> with "normal" lenses, say ~5% frame width onfilm/onscreen max
> separation.
> Sergio
>
>
>
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[Non-text portions of this message have been removed]
• You can always spot someone who is on the metric system. !-) ... camera
Message 2 of 6 , Feb 1, 2006
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You can always spot someone who is on the metric system. !-)

--- In 3dtv@yahoogroups.com, Gerrard Burnell <gedburnell@g...> wrote:
>
> For ease of calculation I'd use the 1/50 rule or for every 1 unit of
camera
> separation the nearest object to the camera is 50 units.
>
> Ged
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