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.
I’ll have to check. I’m running it on Linux via proton, so it might get complicated
Ah yeah then that’s Vulkan
Then surely it’s via Vulkan? Is Proton able to use anything else under the hood?
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.
Honestly I don’t know lol