It's probably because things get janky on high FPS. I wasn't able to complete the game until I capped the FPS in the final mission (helicopter scene).

[–] Baggie@lemmy.zip 6 points 2 days ago (1 children)

Hope you're running on Vulkan, for me it went from 30ish fps to an illegally high number for some ungodly reason.

[–] shiroininja@lemmy.world 4 points 1 day ago (2 children)

I’ll have to check. I’m running it on Linux via proton, so it might get complicated

[–] Baggie@lemmy.zip 2 points 1 day ago

Ah yeah then that's Vulkan

[–] victorz@lemmy.world 6 points 1 day ago (2 children)

Then surely it's via Vulkan? Is Proton able to use anything else under the hood?

[–] dangrousperson@feddit.org 2 points 16 hours ago* (last edited 16 hours ago) (1 children)

Well there is d9vk and dxvk which translates directX 9, 10 and 11 to Vulkan and vkd3d which translates direct3D (directX 12) to Vulkan. So it's all Vulkan on the Linux side, Proton 'just' uses one of these to translate the game into Vulkan or passes it through if the game is already Vulkan.

I don't think there is a native (to GTA IV) Vulkan renderer in game though and therefore there isn't anything more you can or have to do on Linux.

On Windows, some older games actually get performance improvements from the translation to Vulkan.

[–] victorz@lemmy.world 1 points 11 hours ago (1 children)

Can you use Proton on Windows too? Cool if so.

[–] dangrousperson@feddit.org 1 points 10 hours ago (1 children)

No, not Proton, but the dxvk stuff works on Windows too. You just need to replace some .dll files

[–] victorz@lemmy.world 1 points 9 hours ago

Ah neat. Thanks for explaining!

[–] shiroininja@lemmy.world 1 points 1 day ago

Honestly I don’t know lol