2 ms·

I think 10 meters is also the point in real life where 3d stops being noticeable, too, so I'm not surprised your ended up with that number. (I just searched an

I think 10 meters is also the point in real life where 3d stops being noticeable, too, so I'm not surprised your ended up with that number. (I just searched and found numbers between 18 ft and 20 meters.) I don't think the pixel pitch is the limiting factor anyhow, because movement of the head means that sub-pixel accuracy is achieved by the brain anyhow. It's amazing what the human brain lies about in regards to vision.

moron4hire 3y ago
Yeah, I haven't done the math, so I don't know what the exact boundary would be. Supposedly Quest 2's tracking is precise down to ~7mm, SteamVR to 75mm, so depending on the system, micro head movements may not be larger than IOD. Assuming we discount micro head movements, then the ICD is the only stereo cue. I think I remember seeing someone do the math once and said devices like the Oculus DK2 couldn't show anything beyond 10m for 0.07m displacement. Or something like that. Notionally, for some pixel size S, you will not be able to see a discernable difference at Z distance for X view displacement; the left and right eyes will resolve objects to the same pixels.
jerf 3y ago
This is a "you may not be able to unsee" thing once you read this, but... one of the major problems I have with 3D movies is precisely that 3D based on image separation extends out way less than people think it does, because the brain naturally picks up with heuristics and prior knowledge and a lot of other things. So if you're on a closeup of someone's face or something, sure, it can be in 3D. But if you've got a big action scene with, say, helicopters flying around and shooting at people on the ground, the camera is likely to be farther than 20 meters away. If you can see any "3D" at all, it's wrong. It should all be at the plane-at-infinity for you. Which means that if you can see "3D", rather than being an epic fight to save the world or whatever, you've got a fight taking place on a diorama in front of you, about the size of a large table or something. Even something just as the scale like the Transformers being about a block away from you brawling with each other should all be on the plane-at-infinity to you. It kinda takes the drama out of 3D action. Technically, the 2D version of the movie is probably more actually accurate at the important times in a lot of genres.
- jasonwatkinspdx 3y ago
  Yeah, the vast majority of 3D movies have always had that diorama effect to me, though I tend to discount my personal experience with anything stereoscopic because I had lazy eye as a kid, ultimately corrected by surgery, but late enough that my brain mostly ignores the information from that eye. Not totally but mostly. In any case, I don't find the effect unpleasant or pulling me out of immersion, because frankly I don't feel that immersed in AAA cg heavy action movies anyhow. To me it's like watching a fun demoscene with a neat effect. The only time I recall it being a bit tiresome is when friends dragged me to a few horror movies where the 3d was obviously low effort crank it to 11 for this jump scare stuff.
- Darkphibre 3y ago
  Thanks for the warning, genuinely appreciated!! I actually opted not to read this comment, I enjoy the immersion.

moron4hire 3y ago

Yeah, I haven't done the math, so I don't know what the exact boundary would be. Supposedly Quest 2's tracking is precise down to ~7mm, SteamVR to 75mm, so depending on the system, micro head movements may not be larger than IOD. Assuming we discount micro head movements, then the ICD is the only stereo cue. I think I remember seeing someone do the math once and said devices like the Oculus DK2 couldn't show anything beyond 10m for 0.07m displacement. Or something like that. Notionally, for some pixel size S, you will not be able to see a discernable difference at Z distance for X view displacement; the left and right eyes will resolve objects to the same pixels.

jerf 3y ago

This is a "you may not be able to unsee" thing once you read this, but... one of the major problems I have with 3D movies is precisely that 3D based on image separation extends out way less than people think it does, because the brain naturally picks up with heuristics and prior knowledge and a lot of other things. So if you're on a closeup of someone's face or something, sure, it can be in 3D. But if you've got a big action scene with, say, helicopters flying around and shooting at people on the ground, the camera is likely to be farther than 20 meters away. If you can see any "3D" at all, it's wrong. It should all be at the plane-at-infinity for you. Which means that if you can see "3D", rather than being an epic fight to save the world or whatever, you've got a fight taking place on a diorama in front of you, about the size of a large table or something. Even something just as the scale like the Transformers being about a block away from you brawling with each other should all be on the plane-at-infinity to you. It kinda takes the drama out of 3D action. Technically, the 2D version of the movie is probably more actually accurate at the important times in a lot of genres.

jasonwatkinspdx 3y ago
Yeah, the vast majority of 3D movies have always had that diorama effect to me, though I tend to discount my personal experience with anything stereoscopic because I had lazy eye as a kid, ultimately corrected by surgery, but late enough that my brain mostly ignores the information from that eye. Not totally but mostly. In any case, I don't find the effect unpleasant or pulling me out of immersion, because frankly I don't feel that immersed in AAA cg heavy action movies anyhow. To me it's like watching a fun demoscene with a neat effect. The only time I recall it being a bit tiresome is when friends dragged me to a few horror movies where the 3d was obviously low effort crank it to 11 for this jump scare stuff.
Darkphibre 3y ago
Thanks for the warning, genuinely appreciated!! I actually opted not to read this comment, I enjoy the immersion.