Re: Lighting

[crowell@xxxxxxxxxxxxxxxxx (Jim Crowell)]

At 8:36 AM 3/10/96, PHOTO3DGUY@xxxxxxx wrote:
>I was just reading an article on AOL regarding the importance of lighting
>when creating computer 3D graphics.  It's the shadows, shading, and
>highlights that give the flat image it's apparent depth and dimension.
>
>Have not seen any discussion regarding what type of lighting you try to
>achieve in your 3D photo images and how this does or does not enhance the
>depth.
>
>Anyone interested in a Discussion on Depth and Dimension aspects of lighting
>angles, shadows, natural and flash.  I never thought about it much - was
>paying more attention to subject, exposure, focus etc. without looking at the
>shadows.
>

This isn't quite what you were asking about, but highlights work
very well in stereo; stereo enhances your percept of shininess.
Surface highlights generally project to slightly different
positions in the two eyes, leading them to be perceived behind
(for flat or convex surfaces) or in front of (for sufficiently
concave) the surface when viewed stereoscopically.  Your visual
system uses this information to help determine whether a bright
spot is a highlight or a bright spot on the material.  That's
why, for example, water ends to look wetter in stereo.

-Jim C.


------------------------------------------------
Jim Crowell
U.C. Berkeley School of Optometry
360 Minor Hall, Berkeley, CA 94720
(510) 642-7679
jim@xxxxxxxxxxxxxxxxx



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