about the 3D temple (and not the fishes)
the theory to see a 3D effect is to take 2 pictures centered on the same object with an angle of about 10 degrees. But it\'s sometimes too much, because in reality, our eyes are not moving away as we move backward.
To take the screenshots, take one view corresponding to one eye (say the right eye first). Then move a few steps to the left, and take another screenshot for the left eye view. The subject must not move (that\'s why I did not try yet a 3D view of a char as they are breathing).
Many techniques are avaliable to display the depth.
- crossed eyes
the left view is to the right side of the picture. the viewer must cross his eyes until he sees 3 times the picture. The center shows the effect. You can use your hands to hide the extra side pictures. If it\'s too blurry, concentrate on one point and move backward.
- Parallel view
The left picture is displayed on the left. The eyes must stay parallel. Try too look far away.
- Anaglyphs
Using filters of different complementary colors magenta/Blue or Red/Cyan. Both images are filtered and merged. This technique can hardly display colored images if the subject contains areas of one of the filtered colors (a red area will be only seen by one eye). This is why it\'s often used with black and white pictures.
- other methods
some others methods can be used to display the 2 views at the same place but with a time delay. Some gfx cards can synchronise the display with glasses that are hiding one eye since the other is looking at its view. You can also use the time used by the brain to identify a dark image and use dark/light filters. A simple Jpeg can\'t be used for this methods.
About doing the game 3D, it needs to render 2 frames from different angles for each image (such dividing at least by 2 the framerate). And unless you use the anaglyph method, you have to focus your sight to a different distance than the convergence point. That can cause you a headhache.
