I'm relatively uninformed on this, but couldn't you reduce these unpleasant effects by 'flattening' the 3D image? If the optical effect never (or rarely) appears to come more than say, several feet off of the screen, then you loose the nauseating effects, while keeping a kinder, gentler textured image.<p>I saw a 3D at the local aquarium recently and it seemed like every image came as far out as possible. I, of course, left with a headache. After all, a distorted guitar is nice, but any effect can be overdone.