It should be noted that all of the Hollywood 3-D features of the Golden Age (1952-55) were shown in dual projector polarized system. Basicly, the same as used for IMAX 3-D film projection, except it was dual 35mm. This includes ICFOS. A little bit of research will *easily* confirm this.

Anaglyphic (red/blue or any color coding stereoscopic encoding) is cheap and requires no special hardware. This is why many movies originally shown in the superior polarized system have often later shown up in 16mm or later for home video re-encoded for anaglyph. Anaglyph requires no special screen nor display hardware, which is why it's still around after 100 years. But it's certainly a compromise.

To compare 1950's 3-D to 21st century Real-D is also a bit tricky. While the Real-D system is certainly more idiot proof for the high school projectionist running eight theaters in a multiplex, Dual 35mm can be sharper and certainly brighter than it's digital counterpart. Both have their strengths and weaknesses, just be sure not to fall into the P.R. hype bandwagon.

G.Kintz