Re: What kind of 3-D process is this?

[P3D Larry Berlin <lberlin@xxxxxxxxx>]

>Date: Thu, 27 Feb 97 09:48 CET
>From: P3D  Joerg Meyer asks:
>
>Last weekend on ARTE (TV channel on French/German culture)
>there was a program called "Cartoon Factory (part 2)".
>...................... it was not anaglyphic, but some objects
>were colored in red, while others (e. g. background objects)
>were blue/green. What kind of technique is this, and what
>kind of glasses are used?..................


That would be Chroma Depth glasses. They bend colored light at different
angles causing anything red to appear in front of or closer than blue. The
special lenses are essentially two prisms, each splitting the light paths,
the second one corrects the apparent direction of the colors so they can be
seen as if coming generally from the original image. Anything yellow, green
or white tends to appear between red and blue. Black *sticks* to any color
it is surrounded by. Yellow and red used together have some strange effects
depending on several factors. This results in essentially three depth
layers, with the exception that deep blue, shading gradually to white,
displays a relatively good continuous depth change.

Since all the depth effects are due to color, this method is easy for
artists to play with. If you have the glasses, they work on printed images
too, with underwater scenes being the most natural color combinations for
this viewing method. They're fun to have around but are rather expensive
when purchased directly in low quantity. Occasionally someone does a
promotion and distributes these glasses. That's probably the best way to get
them.

For further information visit:

<a href="http://www.earthchannel.com">Chromagraphics TM 3D</a>

Be aware that because the lens (usually used over one eye) splits the colors
of light, it creates a significant blurring effect.

Larry Berlin

Email: lberlin@xxxxxxxxx
http://www.sonic.net/~lberlin/
http://3dzine.simplenet.com/


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