Just tried it out in a full game. Crashed twice, and seemed to have a short period when first loading the game each time where the textures would flicker a bit. But it would stop after a minute or two.
Performance is still lower than OpenGL as the article said, but still very much playable.

I look forward to seeing how much it improves.

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Quoting: bubexelWhen they will implement vulkan on it? any clue?

It's already been implemented in UE4, so I guess it's just a matter of waiting for UT to update to the right engine version.

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I just tried running it with the option __GL_THREADED_OPTIMIZATIONS=1 and it really helps improve performance, and even seems to have gotten rid of some weird texture artifacts I was seeing before. It was mentioned in this thread
https://www.epicgames.com/unrealtournament/forums/showthread.php?19980-Can-performance-be-improved&p=226701 [External Link]

In one particularly bottlenecking area of Outpost23 this option gave me about a 10FPS boost without the -opengl4 option, and about 15FPS boost with it.

__GL_THREADED_OPTIMIZATIONS=1 ./UE4-Linux-Shipping UnrealTournament -opengl4

I wonder if this can be used in other UE4 games.

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This latest version has given a huge improvement to FPS for me. Although strangely it started giving me stuttering problems too.

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I just wanted to report back after trying some actual online matches, that I also notice very smooth gameplay, even though my performance is still very low.

It's interesting to me because usually if you're getting a maximum of about 25FPS you would expect it to go all over the place and experience stuttering, but I get none of that. It stays fairly steady right between 20-25FPS even in the middle of action which surprisingly makes the game playable still if you're patient enough for your eyes to adjust to the low framerate.

I'm using an NVidia GTX 760

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This still doesn't account for SteamOS users though, right?

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I played the tutorial and a practice match with probably around 15-20 average FPS with everything on lowest settings (GTX 760, 8GB RAM, Intel i7 920). Menus are also pretty buggy.

It seems like a really fun game though, I wish I got better performance. I'll probably still try to play some online matches.

I think there's still a good deal of room for performance improvements in the Unreal Engine 4. I get the feeling that Epic is keeping up Linux compatibility with features and visuals, but haven't really focused too much effort on Linux performance yet. But I could easily be wrong about that.

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I've been able to do quite well with the gyroscope in FPS games.

I always set the gyroscope to only be active whenever your right thumb is on the touchpad, that way you always have both modes simultaneously, and give the gyro a low sensitivity (which is used while shooting at a target), and the touchpad itself has a higher sensitivity.

It definitely takes some getting used to since you usually want to rotate the joystick to strafe sideways as you're rotating the camera but since your controller has rotated it feels really weird.
But once you get the hang of it this setup is surprisingly effective.

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Quoting: GuestThe steam overlay is pretty bad for performance, and is really a hack job more than anything else. Plus, it has to work across the board - so it's using an ancient version of OpenGL, not even running in the same context as the application. So it's no surprise that it impacts performance so much.

Is the steam overlay even necessary anymore? I remember when I still played steam games on a windows partition it was useful because using alt+tab from a fullscreen game would freeze for quite a while before you'd get the desktop. I think this was the motivation behind steam developing the overlay in the first place.
But my experience on Linux has always been that you can rapidly switch back and forth to other applications or desktops no matter how demanding the game is, even when running the game in fullscreen at a lower resolution than your desktop. It's actually faster for me to pull up a steam page by switching desktops and opening it in firefox than it is for me to pull it up in the overlay.

Does windows still have hangups when alt+tabbing out of a game? It would be great if valve could just get rid of the overlay entirely, since I think a lot of the design decisions are tied into that (like having steam render its own windows on the desktop)

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I don't think you can say anything about valve "squashing competition" or anything like that. It just simply doesn't make any sense to digitally distribute a digital distribution platform.
I don't even think the Itch.io team would really want people launching it through steam. I'm sure if they could take the advertisement and publicity they get from steam without actually having their software on steam then they would take that deal, and so would probably anyone interested in it.

Maybe one day steam will just sell advertising slots for applications that don't want (or need) to be put on steam. When that day comes and steam denies competition, then I'll be shocked. But what they've done here is completely reasonable.

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