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Shadow mural

Elusive artwork that can only be seen at sunset
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While staring listlessly at my bedroom wall once, I noticed quite a striking effect. It normally looks like a plain, white painted wall (which it is), but as the sun went down, for a few minutes it was shining directly along the surface of the wall. The angle of the light caused every tiny dip or bump in the wall to cast a shadow, so every previously undetectable feature became highly visible. It was also quite a fetching fiery red colour, but I digress...

My proposal is to use this effect to make a mural which is only visible at sunset. At most times of day, the wall would look like a perfectly ordinary wall. But it is covered with tiles which have had a picture printed on them with tiny dots of enamel. As the sun goes down, for a few minutes every evening the dots are thrown into sharp relief and the picture becomes visible.

spacemoggy, Apr 18 2004

Shadow Parks http://www.halfbake...idea/Shadow_20Parks
related idea by [lostdog] [krelnik, Oct 04 2004, last modified Oct 05 2004]

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       I read about a bas relief of a similar nature, done on the outside of a building in Europe. See my annotation near the bottom of "Shadow Parks."
krelnik, Apr 18 2004
  

       This is indeed a cool idea. I did read about a slightly similar concept in wired/or tv. A video camera was hooked up a computer and output to a "monitor" made up of blocks of wood that would rotate, thus changing, the depth, color (something, I forgot). It got the values from the RGB pixel values. Very freaking cool.   

       Someone did run around my little city just the other day and drew outlines around the shadows of objects in the street. Perhaps this was you...
SpocksEyebrow, May 06 2005
  
      
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