In my last Ground projection Test, I used a slanted 2D image of an underground metro tunnel, and it kinda worked. But I want to try to use a real 3D underground space. The problem is that it has to be somehow slanted and distorted to be seen by the camera and rendered properly as an Anaglyph from the spectator oblique point of view.
So I created an underground floor, added 3 columns, a dragonfly, another green frog , work signs, a compass, a coke bottle(antique), "the eye", and a wooden ladder. I had to fiddle back and forth between camera view, and Anaglyph view from an oblique angle on a flat monitor, adjusting angles, size, position, and amount of anamorphic distortion until the image looked convincing enough from the "sweet spot". This actually is the biggest problem with this kind of 3D anamorphic illusion, it can only be made perfect from one spot. Moving forward, backward or sideways alters the perspective and the illusion.
This is what I have now(version 9). Click for full size image, and to see it properly, wear anaglyph glasses, lay your monitor down, and look at a low angle:
So I created an underground floor, added 3 columns, a dragonfly, another green frog , work signs, a compass, a coke bottle(antique), "the eye", and a wooden ladder. I had to fiddle back and forth between camera view, and Anaglyph view from an oblique angle on a flat monitor, adjusting angles, size, position, and amount of anamorphic distortion until the image looked convincing enough from the "sweet spot". This actually is the biggest problem with this kind of 3D anamorphic illusion, it can only be made perfect from one spot. Moving forward, backward or sideways alters the perspective and the illusion.
This is what I have now(version 9). Click for full size image, and to see it properly, wear anaglyph glasses, lay your monitor down, and look at a low angle:
All I have left to do now is make everything move and fly around!
But first, I want to do a full size ground projection test to determine the best position for the spectators, and choose the "sweet spot". I am afraid actual concrete is going to be too dark, too textured, and too uneven to get a bright sharp image. So I want to lay on the ground 4 sheets of masonite painted flat white. The seams can be taped with white gaffers tape. The projector will have to be way up in the air, unless I can figure out how to use a wide angle adaptor...
Well, it works! I just stuck the wide angle adaptor for my canon G12:
in front of the projector lens, and boom, the image on the screen gets almost twice as big, with no noticeable loss of sharpness. All I have left to do is a figure out a way to hold it in place(besides duct tape...).
That's done too, with just a few screws and two pieces of aluminum:
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