What would you ACTUALLY see in spherical geometry
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- Опубликовано: 21 мар 2021
- In spherical geometry, you would see the back of your head. Everywhere (unless your view was blocked by something)!
As far as I know, this aspect has been AFAIK always left to the reader's imagination so far. Let's change it, by rendering a simulation using realistic 3D models!
This is not 100% accurate (ALL the light rays hit your eye, so you would actually see yourself in ALL directions) but should be close enough.
As seen from the animation, the view from a single eye is rendered. With two eyes, you would correctly see the back of your head behind you -- at least if your brain did the maths correctly (it is not actually used to seeing things behind you, so it would probably just assume that is an error -- this can be seen in VR simulations.)
Models from: renderpeople.com/free-3d-people/ 
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How could anyone be productive in spherical geometry, I'd be too distracted seeing the back of my own ears in the background of everything
you'd be used to it
Neat! You should try uploading with the equirectangular projection so the audience can look around with RUclips 360 (or 180 to be more realistic). They also support stereographic uploads for VR.
I have added VR versions of some old videos. But it seems to be not worth the effort. They are a bit annoying to make, and not many people seem to be interested in them. If you want to explore these worlds, the best thing is to download the demo and play it yourself in VR or not (although I do not create demos for ones based on third-party models, like this one, because the license is not clear). Plain videos are still a good way to communicate what is possible, and the Internet is built more to promote videos than explorable things.
... the weirdest thing about this is that, if you lived in that world, all of this would look perfectly natural.
Eldritch horror POV, got it.
I'd love to see it with realistic ambient occlusion, shadows, and light sources. Presumably it would be impossible to see anything unless there was an off center light source illuminating the back of your head.
You mentioned that, if our brains properly calculated all light rays, it would be able to see things behind you like the back of your head.
Given the plasticity of the human brain in things like upside-down vision (where if you wear glasses which flip all light, then after a few months your brain can start interpreting the light properly), I wonder if a person living in a small spherical geometric space for a year would eventually be able to see in all directions like that.
This is simultaneously reassuring and horrible.
Finally a dimension to send egocentrics to
Whole lot of weird...
Non Euclidean geometries are fun to play with.
I did not like going into the woman's face, and I did not like going into the man's face. Thank you.
this is why babies cry when born because they’re freaked the fuck out by the weird way any world looks before you get use to it
That's... not creepy at all!
Very cool! But just one question! How do you get the Multiplayer mode to work on HyperRogue?
Gah!!!