I have an game made with Unity 4.7 and wondered if I could make VR work with it?
Because of all the breaking changes since 4.7 there is no way to update it to a later Unity.
It would require less effort to bring the game’s code in line with a version of Unity newer than four years old than it would to try and cram VR into the 4.x cycle.
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I dunno though… I have a strange feeling cramming VR in might actually be the most efficient option.
If only I could use the legacy networking in the newer versions or VR in the earlier versions. Welll… there might be a compromise if I used Unity 2018.1. I could probably cram it all in there. Even though the PhysX version will be a bit different.
Nope… it says minimum supported version for Oculus app development is 2018.4. So close yet so far.
Well here it says that I have to use at least 2017.3 otherwise it will cause headaches.
You want to use single pass instanced, I don’t know exactly when it was introduced though
Hmm. First page I can see is for Unity 2018.4, then it skips 2019 and is there again in 2020.
So from all these things it looks like realistically, Untiy 2018.4 is the earliest one that will work properly with VR.
Oh well. Looks like I’ll have to update the game and update the networking if I want VR. Maybe earlier versions would be able to do simple graphics.
Don’t forget that 2020.2 reports correct deltatime which means no jitter 
goddamit. 
Is this noticeable?
Unless you have the source code for that version, it’s not possible AFAIK. You could probably get a desktop VR SDK working via a native plug-in to get input, but VR need some low level integrations to rendering which I’m not sure are possible using only a plug-in.
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Depends on how sensitive you are for jitter. I can’t even play a movie at the wrong framerate (24fps on a 60hz monitor for example)
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That is strange. I’ve never had that problem myself. Only thing I noticed once - in the olden times - was that setting the refresh rate of a monitor too high gave me a headache.
Well looks like I’ll have to go with plan B. Which is try to copy the Network class into Unity 2020. I wonder if that’s possible. I hope it’s just a case of copying some c# library files. (No I think this is impossible).
To be fair, a multiplayer game in VR is probably going to have some jitter just due to latency.
Our VR game uses a tick rate of 20hz its looks pretty decent, we just rewrote our filtering too its looks a bit better with the ne. Interpolating.
https://www.youtube.com/watch?v=NtFg7xANvpk
Edit: the IK needs work though 
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Yes, I guess you’d need good interpolation when using VR. And if the time steps are quite far appart the interpolation would cover up most of the jitters. Your head movement of course would have to be very reactive, but things controlled by the other players don’t have to be.
Nothings ever easy. 
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