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Perspective (discuss.tchncs.de)
submitted 4 months ago* (last edited 4 months ago) by noerdman@discuss.tchncs.de to c/comicstrips@lemmy.world
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[-] AnyOldName3@lemmy.world 50 points 4 months ago

Tilting your head shouldn't make a difference as 'modern' (as in the ones that cinemas started using fifteen years ago) 3D glasses use clockwise and anticlockwise circular polarisation filters, and obviously, turning something 90° doesn't change whether it's clockwise or anticlockwise. Other kinds of polarisation filters do care about being rotated, which is probably where the artist got the impression it applied to 3D glasses, but it would be dumb to try and use that kind as obviously, people tilt their heads.

[-] crater2150@feddit.org 9 points 4 months ago

Wouldn't it still look weird because the two images are offset in a different axis than your eyes?

[-] AnyOldName3@lemmy.world 6 points 4 months ago* (last edited 4 months ago)

It can make it look a bit weird (and be one of the things that makes people nauseous), but most people's brains are good enough at figuring it out that it's not a major problem. It wouldn't make a difference to the situation in the comic, though, as in that frame, they're talking about making both lenses match to pick between two 2D movies, so there'd be no offset anyway.

[-] Squibbles@lemmy.ca 7 points 4 months ago

Huh I guess I haven't been to a 3d movie in quite some time. I definitely remember had tilting used to work

[-] Kichae@lemmy.ca 3 points 4 months ago

3D IMAX was way later to using circular polarizers (if they ever switched). Were you only watching 3D in IMAX?

[-] jol@discuss.tchncs.de 0 points 4 months ago

I don't know what modern means here, but the cinemas I go to still use the same glasses as from the beginning of 3D movies.

[-] AnyOldName3@lemmy.world 0 points 4 months ago

Anaglyph 3D (with the red/cyan, or lower-quality red/blue filters) has been around since the 1800s (3D films predate talkies by decades), but was much more of a gimmick and wasn't used for big-budget serious films as it ruined the colour quality, mainly being used for 1950s B movies. There were a bunch of other methods used between the 50s and 2010-ish like regular Polaroid filters (which did stop working when you tilted your head like in the comic and were a hassle for other reasons) and active shutter (which relied on expensive and heavy glasses with electronics in). The newer kind that relies on circular polarisation became available since the turn of the millennium, with Avatar in 2009 being the film that made most cinemas buy new projectors. Those glasses made 3D films viable as the standard for a few years, before people generally decided that most of the time, being 3D didn't add enough to the viewing experience to be worth paying extra for and studios decided it wasn't elevating their art enough to justify the extra production costs if people weren't going to pay a premium.

[-] VindictiveJudge@lemmy.world 1 points 4 months ago

people generally decided that most of the time, being 3D didn’t add enough to the viewing experience to be worth paying extra

Because most of them were just 2D movies converted to 3D in post. Doing that tends to look like crap. The ones filmed for 3D, like Avatar, looked amazing, but studios didn't want to wait for the next wave of films and wanted 3D now with what they already had.

[-] jol@discuss.tchncs.de 0 points 4 months ago

When I said the beginning of 3D movies, I meant the Avatar Era. And the ones I usually see are normal polarised, not circular. And to me it's still a stupid gimmick thst adds nothing positive to the experience of watching a movie.

[-] AnyOldName3@lemmy.world 1 points 4 months ago

Unless your local cinema got a good deal on a projector from a 1980s theme park 3D movie, it's definitely using circularly polarised filters. If you've tried tests like putting the lenses from two pairs of the glasses or one pair of the glasses and one pair of regular polaroid sunglasses next to each other and rotating them, that'll still make them get brighter and dimmer like with linear polarised filters, as passing through the filter can change the polarisation to elliptical, and that means it'll be affected by rotation when it gets to the second filter.

[-] gnutrino@programming.dev 50 points 4 months ago

Yeah, Hank Green started making them after his wife got a headache watching a 3d movie: http://www.2d-glasses.com/

[-] noerdman@discuss.tchncs.de 21 points 4 months ago* (last edited 4 months ago)

Ha, that's actually awesome :D. Dang, maybe I even heard about that years ago, forgot about them and now thought I'd just have had a nice comic idea. Oh well, however the synapses fire, I guess ¯\_(ツ)_/¯

Guess with your link I won't do him any favour if I take this down as unoriginal, so I'll just leave it up and consider it free advertisement for him.

/edit Also, I don't think he came up with the idea of showing Frozen and Die Hard in the same cinema so you can enjoy a theater with your kid while avoiding Let It Go, so at least that part's an original idea ;). Yeah, that'd require headphones.

[-] jawa21@lemmy.sdf.org 2 points 4 months ago

Many places already offer headphone listening over a specialized radio broadcast iirc. So, it is still doable.

[-] bestagon@lemmy.world 42 points 4 months ago

Used to fantasize about these being used to play local multiplayer without having to split the screen

[-] brognak@lemm.ee 21 points 4 months ago

Iirc Sony did this with the PS3 and their own PlayStation branded TV.

[-] magickrock@sopuli.xyz 14 points 4 months ago

Sony patented this in 2010 to allow people to simultaneously watch two different videos on the same TV.

[-] Landless2029@lemmy.world 8 points 4 months ago

So I have a lazy eye and went to a 3D Aquatic documentary on a family trip. Basically watching it with one eye because of partial functionality in my bad eye.

Something happened like 30 min in during a scene with jellyfish and my brain turned on 3D and everything popped out me. Totally tripped me out.

Doc always said my brain relies more on my good eye and I think it decided it needed the bad eye during the flick. Pretty cool.

[-] SkyezOpen@lemmy.world 2 points 4 months ago

Makes me think of the asdfmovie when someone accidentally turned on the color.

https://youtu.be/qW0pYFDFlTE

[-] samus12345@lemm.ee 2 points 4 months ago

I forgot 3D movies were still a thing. I only ever saw Avatar and Coraline in 3D.

[-] VindictiveJudge@lemmy.world 6 points 4 months ago

Even after the camera for it was invented (for Avatar, iirc) most studios just filmed in 2D and converted it to 3D, which looked awful. So on the one hand you have a small number of movies, like Avatar and Coraline, filmed in 3D and looking gorgeous, but on the other hand you have a ton of movies filmed in 2D and hastily converted to 3D to cash in on the success of the ones filmed that way. Those movies looked awful and pretty much killed the trend.

However, the theaters still had the equipment to show them because it's not like there's really anyone to sell it to, and the 3D cameras are still out there, too. So every once in a while someone decides to put that equipment to use. It's not many, though, and most 3D movies are still 2D conversions, so you don't get much out of viewing them in 3D, and the conversion process and the display tech can actually make them look worse than just watching the original 2D version.

[-] Amir@lemmy.ml 1 points 4 months ago

Hmm I should get one of these, pretty good idea

[-] niktemadur@lemmy.world 1 points 4 months ago

Here's fun trick: rotate the glasses 45°, see which movie you get to see, it could go either way!

[-] Blue_Morpho@lemmy.world 1 points 4 months ago

It's a convoluted way of reinventing an eye patch.

You don't need to obtain and install a polarized filter when you are only using that filter to block all light going to one eye. Tape a piece of black paper over one lens, ya dummy.

[-] SkunkWorkz@lemmy.world 9 points 4 months ago

You the dummy. The modified glasses would make both eyes receive the same polarized light thus the same picture, not block the light.

[-] Blue_Morpho@lemmy.world 3 points 4 months ago

You're right!

[-] Zero22xx@lemmy.world 1 points 4 months ago

The thing that I don't like about '3D' movies is that they're clearly flat 2D images like a bunch of cardboard cutouts with a bit of trickery to get certain things to stand out more than others, and I can't see it as anything else. I can lose myself in the movie for moments at a time but am constantly pulled out of it and back into the real world every time something fucky happens with my perception or I try to look at a detail in the background that just stays blurry.

this post was submitted on 12 Jan 2025
335 points (100.0% liked)

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