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Topic: Who Is Installing Digital Projection For "Chicken Little"?
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Stephen Furley
Film God
Posts: 3059
From: Coulsdon, Croydon, England
Registered: May 2002
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posted 10-07-2005 12:40 PM
Well, the coating on silver screens is sprayed on, so I suppose you cou could spray a drive-in screen, but I don't think it would last very long. The surface marks very easily and I can't imagine that rain would do it any good. Re-spray it once a week maybe?
As you say, light would be a major problem, even if you could make a suitable screen. Getting enough light on a drive-in screen is difficult enough at the best of times, without losing most of it in the polarisers and the glasses, plus the extra glasswear required if you were running a single-strip system. I think you'd need to be running two strip 70mm, or better still IMAX to stand any chance of getting a reasonable picture. I find that single strip 35mm 3-D looks best on screens up to about 20 feet, and two strip up to about 35 feet, beyond that you really need something bigger.
As for doing it with video/digital systems, I don't know of anything that comes close to putting out that much light; has anyone tried doing it with an array of small, low cost LCD projectors, video wall style? Some of these things can put out a surprising amount of light, if you had each one covering just a small area of the screen you might be able to do it; sounds like a nightmare to line up though!
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Phil Hill
I love my cootie bug
Posts: 7595
From: Hollywood, CA USA
Registered: Mar 2000
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posted 10-07-2005 08:34 PM
quote: Brad Miller
The best 3D I have ever seen was IMAX Nascar
Then, Grand-Poo-BAH, you had better go see "T2-3D" at Universal when you're out here at the end of this month. It IS by far THEEEE best 3D ever. Oh AND NO crappy POS heavy/awkward LCD headgear...it's a linear polarized system.
Having worked on many 3D films including Jaws 3, Friday 13th, etc as well as well as a ton of Special Venue shows...AND having installed over 150 3D 35mm, 570, 870, and 1570 film and DLP theatres with dual projectors and over-under and side-by-side systems, I can honestly say that the majority of the posts here are hearsay and most of the posters have NO clue as to what they are spouting.
About the only one that is accurate is Brain. With some parts of others true as well.
No matter the media, IF the 3D images are correctly recorded as to the inter-ocular and focal/focus point, and correctly projected, it will not result in eye-strain and headaches...NO matter how long the film.
The ONLY system that requires a "silver screen" rather than a matt screen is a polarized system. Those crappy LCD systems DO NOT require a silver screen.
Circular polarization is NOT preferable to linear polarization since the image separation is not a great. Studies, including my own, have show that even with motion rides, one's head tends to remain vertical due to the body's normal reflexes and thus doesn't affect the 3D effect.
It's a shame (and sham) using a LCD system most especially with a rolling loop projector. In order for the LCD 3D system to work, each "eye" can only be allowed to see 50% of the time. So an additional shutter must be installed to limit that GREAT normal 67% shutter efficiency to 50% thus wasting a lot of light (i.e. image brightness). This is true even for allowing for the extra time required for the LCD panels to change from dark to "almost clear".
The best 3D system for the most light to the viewer's eye is a Linear Polarized system which is about 32% efficient overall. The worst is LCD with about 25%.
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Mark J. Marshall
Film God
Posts: 3188
From: New Castle, DE, USA
Registered: Aug 2002
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posted 10-07-2005 09:42 PM
Captain style and clip on glasses are what I suggest. The cheap-o card board glasses suck major ass.
Watching hours and hours and hours and hours of 3D didn't cause me any eye strain at all, nor the other three people that were with me for the entire festival. There were a few prints that had some problems (most likely due to their age) where the image on one side (or the other - or BOTH) would move up and down slightly during the course of the show. I can see that causing some discomfort if left unattended. Thankfully, the projectionists at the show were pretty quick on the frame knobs. Cat Women Of The Moon comes to mind. The other potential problem was Gog, which had one full color print and one pink print. So depending on what you saw, Brad, some discomfort may have been expected I guess.
For what it's worth, I do think that eyes need to "train" themselves to look at 3D, but they can learn. And I agree about Terminator 3D, Phil. ![[thumbsup]](graemlins/thumbsup.gif)
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Stephen Furley
Film God
Posts: 3059
From: Coulsdon, Croydon, England
Registered: May 2002
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posted 10-08-2005 06:03 AM
quote: Phil Hill
The ONLY system that requires a "silver screen" rather than a matt screen is a polarized system. Those crappy LCD systems DO NOT require a silver screen.
This is what I would expect, and I was rather puzzled by the silver screen at the Pepsi london Imax when I first saw it. When I saw the ghost image with tilted head, it seemed that there had to be an element of polarisation in use as well. Didn't really understand this, and there was no technical person around to ask about it. Then I read what Brian said:
quote: Brian Michael Weidemann
They were, indeed, battery powered, but they were infrared, not laser. The glass in them was polarized, so they would work without a battery (should it die in the middle of a show, and if the projector ran with polarizers, too).
Does this mean that the LCD system was simply not working properly at the PLI? If so, then this was the case for several shows, several months apart, and it is highly unlikely that I would get the same headset for all of them. Was the LCD system not working at all? Switched off due to some technical problem with it? If so it was a problem which lasted for several months.
quote: Phil Hill
As sick as I am, I also really liked a lot of the Three Stooges 3D stuff...
You wouldn't like the Anaglyph Super-8 print that I've got of 'Pardon my Backfire'. It's got to be the worst 3-D print ever made, in any format. It was bad to start off with, made even worse by subsequent fading, and the glasses supplied with it were made of very thin material with uneven streaky colour, in pale, unsaturated colours, Looked like old recycled toffee wrappers! With junk like this around is it any wonder that 3-D has a bad reputation? This print is worth keeping, just as an example of how bad one can be.
quote: Phil Hill
No matter the media, IF the 3D images are correctly recorded as to the inter-ocular and focal/focus point, and correctly projected, it will not result in eye-strain and headaches...NO matter how long the film.
I'm sure you're correct about this, but that's a very big 'if'. In by experience, most 3-D shows in ordinary cinemas were bad; some very bad.
Phil, I've just noticed the hair-do in your new picture; do you use the same hairdresser as my 'neice' from a couple of years ago?
Thankfully, I am no longer Tiny Tears' uncle; her 'mummy' has now grown up somewhat, no longer plays with dolls, and no longer insists that I have to play with her. Tiny now has a new mummy and daddy, the younger sister and brother of the original one, who don't seem to think that she needs a middle-aged uncle!
Strange things, children; I never could understand them!
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John Pytlak
Film God
Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000
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posted 10-10-2005 08:33 AM
Some of the people involved in the 3D films at Disney theme parks included Dr. John Simonds of the Kodak Research Labs, Murray Lerner, and Steve Hines:
http://www.hineslab.com/Disney3dCameraRig.html
quote:
The Disney dual-camera 3-D Rig developed by Steve Hines in 1980-81, for shooting stereo motion pictures, is owned by Walt Disney Pictures and is shown here as an example of engineering now available from HinesLab. The Disney rig is the original dual-camera 3-D rig to use cameras in the compact forward-and-down arrangement. No modification of the cameras' shutters is required...
Disney 3-D Rig films:
"Magic Journeys" for EPCOT Center, Orlando, Florida
"Captain Eo" for Disneyland, Anaheim, California
"Muppetvision 3D" for Disney/MGM Studio Tour, Florida.
"Honey, I Shrunk the Audience" for Disney/MGM Studio Tour in Florida, & Disneyland in Calif.
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