refresh rate, fps, and smoothness

[TheWarsimmer]

Because a lot of people may be unaware, it's often best to make sure your fps is at or above the refresh rate of your hmd. While it is mainly preference, a lot of your judder is caused when fps drops below the refresh rate, due to the nature of how the two relate. Let's say you have a g2 and you get between 60 and 70 fps. Set your refresh rate in wmr to 60 and the jitter will be gone. Test it by flying low and fast past trees and when you look out the side of the cockpit they will be smooth as silk. Yes, there are tradeoffs such as the flicker a lot of people cannot stand, but you should try it and see what you prefer. Imo it is worth it and much better than any crummy reprojection.

Edited October 27, 2022 by TheWarsimmer

[firdimigdi]

Sadly that doesn't help in the situation where the framerate is actually locked at maximum native framerate but the game is still not smooth.

 

The metric to look at is always frametime, this will give you a good estimate of how much headroom your have.

 

That said, in single-player IL-2 this doesn't always reflect the truth because the GPU frametime might be fine but things are happening in the engine that affect the rendering of airplanes (including the player's) which in turn affects smoothness. As I've written before this is best seen in chase camera mode where all surrounding motion (trees, terrain, structures) is smooth apart from the airplanes - this unfortunately occurs even with a G2 locked at 60Hz or a Rift S at 80fps with just 6msec GPU frametime.

[TheWarsimmer]

Yes that is an unfortunate example, but not too much of an issue for me. Do I wish it could be fixed however? Of course.

 

I always go by the tree test to make sure things are as smooth as can be helped on my end. Engine issues are out of our control, as you say.

[Paul_RSXK]

As others have posted elsewhere and in particular on the MS flight sim forums. What you are trying to achieve is a smooth flying experience in VR in all scenarios, Continually chasing that extra 2-3 FPS is ultimately a waste of time and effort. Figure out what your max is and then dial it back and fix it to provide a buffer.

I also use MR and that helps a lot.