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Re: [3dtv] stereoscopy rule

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  • Gerrard Burnell
    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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    • vfxdoctor
      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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