Chris B nous apporta ses lumieres en ce 22/09/2006 08:10:
> "Trevor G Quayle" <Tin### [at] hotmailcom> wrote in message 
> news:web.4513463bb2c58e128fb5a6f0@news.povray.org...
>> Warp <war### [at] tagpovrayorg> wrote:
>>> Rene Bui <ren### [at] freefr> wrote:
>>>> It's seems to be the polarized light technique or something
>>>   Polarized light? Isn't it just a simple occlusion technique where
>>> you see just part of the image at a certain angle?
>>>
>>> --
>>>                                                           - Warp
>> It seems so.  Sort of like a poor man's version of the little hologram 
>> cards
>> that you could get in cereal boxes and such with the ridged plastic front.
>> I may have to try it some time...
>>
>> -tgq
>>
> 
> This thread provoked me to wondering whether this masking technique or the 
> lenticular prints technique could be wrapped around a cylinder to give a 360 
> degree rotatable 3D stereoscopic image. I figure that it should be possible 
> to adjust the print line spacing and interlacing to compensate for the 
> distortion of wrapping it into a cylinder, but I've never seen anything but 
> flat ones.
> 
> Anyone ever seen or tried anything like this?
> 
> Regards,
> Chris B. 
> 
> 
In that case, the needed offset will vary with your distance to the cylinder and 
wether you are vewing the middle part of the visible section, nearly 
perpendicular, or near the edge, grazing angle. This mean a variable distortion.

-- 
Alain
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