The 3D effect I got by using a pair of stereo cameras in After Effects placed at a location straight above the center of the projected image is reasonably effective, but the problem is that the images have to be slanted at a roughly 45 degrees angle to be seen by the vertical cameras:
So the space they move in is not a true square x,y,z 3D space, the z axis is slanted, and that makes it impossible to visualize what the spectator will see while working within After Effects. The two camera views have to be rendered, assembled as an Anaglyph, and viewed at an angle from the narrow end on a horizontal monitor with cardboard glasses in order to know what the spectator will see:
I tried to use the stereo rig built in After Effects CC so I could visualize the final anaglyph directly in AE as I worked, but it is set up in a horizontal format, and the anaglyph I need has to be in a vertical format, so I ended up with a cropped partial image:
I tried to place the cameras at the spectator location, and got a great 3D effect:
I suppose I could project from that angle, and get a more or less oblong and rectangular image on the ground, but the projector would be behind the spectators, so they would cast a shadow, and I doubt the depth of field would be enough to get the image in focus front to back. Not to mention the light fall off front to back and the parallax concerns.
To project from above, I have to distort the images both in perspective and anamorphically into a rectangular vertical 1920x1080 format . The final anaglyph looks 3D alright, but the ground appears slanted down(you need to look at this image with the glasses and the monitor laid down flat):
So, unless I get a new better idea, looks like I am pretty much stuck with my original imperfect hybrid slanted flat object perspective... Even if I could easily make 3D objects with Leonar3do, I couldn't use them in a ground projection. Bummer!
So the space they move in is not a true square x,y,z 3D space, the z axis is slanted, and that makes it impossible to visualize what the spectator will see while working within After Effects. The two camera views have to be rendered, assembled as an Anaglyph, and viewed at an angle from the narrow end on a horizontal monitor with cardboard glasses in order to know what the spectator will see:
This makes it very slow to work because of the necessary back and forth adjustments.
Also, "not quite 3d objects" created in Photoshop 5 (like the globe) look fine, but true 3D objects like the cube cannot be used because their perspective ends up wrong, the cameras and the spectator being in different locations and viewing at a different angle:
I tried to use the stereo rig built in After Effects CC so I could visualize the final anaglyph directly in AE as I worked, but it is set up in a horizontal format, and the anaglyph I need has to be in a vertical format, so I ended up with a cropped partial image:
I tried to place the cameras at the spectator location, and got a great 3D effect:
To project from above, I have to distort the images both in perspective and anamorphically into a rectangular vertical 1920x1080 format . The final anaglyph looks 3D alright, but the ground appears slanted down(you need to look at this image with the glasses and the monitor laid down flat):
So, unless I get a new better idea, looks like I am pretty much stuck with my original imperfect hybrid slanted flat object perspective... Even if I could easily make 3D objects with Leonar3do, I couldn't use them in a ground projection. Bummer!
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