Shipping for HTC Vive - 45 FPS cap

[ZEROONESTUDIO]

@KRushin;543513

Like Ambeshee was clue’d in on, yes. Unusually specific and for a reason

This is a known issue, you most likely have “Enable Reprojection” enabled in the steam settings. DISABLE this setting (i think it is enabled by default). I’ve encountered the issue aswell, it seems to almost be random at times to what your rendering (not even a heavy taxing scene can cause it to go to 45 fps). UE4 “locks” to 45 FPS. The issue is logged as UE-30406

Hey there, KRushin! Thanks for the reply! Thank god it’s not just me.
Awesome to hear the bug has been logged too!

I did attempt turning that off in my debug process and the SteamVR software would send out blank (black) frames in place of missed frames. I presume this is normal behavior as re-projecting would check the render sequence multiple times to ensure frames aren’t missed.

P.S. I just tried shipped the project in 4.12 (I also noticed that they updated the SteamVR SDK integration within this update) and the tracking seems to be much more natural and less frame-dependent or simply more optimised.

Thanks again, KRushin.