P3D color shadows!

[John Baird <jbaird@xxxxxxxxx>]

>The light from the lamps is cast onto a screen, causing two
>colored shadows of the model(s) to appear on the screen. 

>Isn't a shadow supposed to be black even if cast by colored lights?

>George Themelis

george!  i think what is happening is this!  if you project two colors
onto a screen, (with the projector's lenses inches apart) like red and
green, you would see yellow on the screen!  if you introduced an object
between the projectors and the screen you would get two shadows! instead
of being black, one would be red and the other would be green! it's a
subtractive process! where the green light is blocked, the red light of
the other projector is still shining! 

i'm getting ready to explore this phenomanon with my 3d abstract light
painting photography! i was glad to see this mentioned on the list!!!
all because boris is trying something new!!!  good for him!

tooDDDeloo!!   janni bearDDD!!  creative stereography!!  kansas city!!


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