posted on May, 11 2009 @ 06:51 PM
I don't say there are multiple light sources.
There is only a very big costly projector, very powerful which is supposed to replace the sun.
However, for as powerful it can be, it can't replace the sun.
The sun is an incredible powerful source of light, very far away, very concentrated which is able to light all the face of the earth or the moon which
is exposed to its light in an even way.
If they had used several sources of light, several powerful projectors, they could have lit the scene in a more even way, but in that case they
couldn't have avoided the multiple shadows.
Conclusion: Whatever the way they light the scene, they can't reproduce the effect of the sun.
About your demonstration of Mythbusters, I well know it.
I should like to point out that the experiment was done with the light of a projector and not the sunlight; however, it's true that even with the
sunlight, with the help of the relief and reflection you can have shadows of various directions and lengths.
But the sun will always light the foreground and the background the same way, provided that nothing bars its way.