Custom mods / adapters to make 2D TVs 3D compatible

[Lee A Stewart]

It's essential. Without it, your 3D is going to look like this:

[tripletopper]

How would you get a double image if the timing is right on an external syncer is proper and correct?

That looks like a Polarized Passive double exposure.

The only way you could have an active shutter-based double exposure is either mis-timing or something mechanically wrong with the eyeglasses.

the only reason you get double exposure in a pause is so you could stare at the paused picture in 3D accurately. otherwise if you are watching a video that was meant to be watched with shutter 3D you'd get the Wang Chung/ Max Headroom effect. Alternating discontinuous frames.

if the only thing preventing a universal shutter 3D add on working according to Lee's theory (not saying it's either true ot false) is a backlight, I don't know how that is disqualifying, since modern technology takes a less intense, more broadly spread, constant (strobing?) white light vs CRTs, and changes pigments every so often all at once, then wouldn't all modern TVs qualify as backlit? Isn't that true of all subtractive color TV (starts at white shaded by pigments?) as opposed to additive color technologies, (start at black, add different intensities of 3 component color lights and make their duration lomg enough to perceive, both short enough to refresh by next frame?) Have a backlight?

[Lee A Stewart]

Originally Posted by Lee A Stewart

It's essential. Without it, your 3D is going to look like this:

This is not double exposure. It is one of the cons of active shutter glasses: ghosting.