1. Cross-talk
Stereoscopy is never perfect; there will be always some kind of leakage from one perspective view reaching the wrong eye. Make sure to limit the parallax before cross-talking gets too high.
2. Motion
Make sure that things that have high parallax are not moving too fast. Especially if they have negative parallax.
3. Interposition
This is one of the most common errors nowadays. Content creators tend to add objects to stereo scenes in post-production and they forget the objects that are in front of others should hide them. How often have I seen objects going through other objects and completely destroying a good 3d movie.
4. Interference
Sometimes there might be structures that repeat themselves in a certain frequency, like the bars on a jail. A problem might occur if this frequency matches the parallax separation. This can lead to very disturbing images and increase the possibility of people getting headaches.
5. Camera changes
Event changing the camera settings too often. You might already have noticed that movie trailers in 3D are usually more difficult to see than the movie itself. This is due to the frequent cut to scene with different focus and parallax values.
6. Negative Parallax
Avoid using too much of negative parallax on longer movies. Viewers will find positive parallax (behind the screen) more comfortable.
7. Contrast
Avoid high contrast on scenes with high parallax. One of the main problems here is due to the LCD technology. Neighbor pixel will tend to light up a bit causing ghosting which will destroy the parallax.
8. A 3D Display is a window!
Treat the 3D display as a window. Things that should come out through the windows must fit completely inside it. If you try to move something out of the window and it touches the border, the object should stay where it is!
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