Quote:
Originally Posted by Insuber
WOW! Exciting, we will call this discovery, ehmm, let me think ... Perspective! I think it's a nice name, isn't ? 
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No, no, the sun is so far away that the shadows should be parallel...
Here the shadows converge on a point on the ground, at the apex.
Think about it, a sun dial couldn't work
edit: the shadows are parallel, but we see them in perspective...