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My question is, with Batman: Arkham Knight coming this fall, what do you think can be done (if anything) to improve Unreal performance, short of upgrading to Unreal 4 (which probably won't happen)? I know some of you out there have more experience in programming and even game development than I do. Is there anything that can be done? We know these third party porters like Feral and Aspyr try their best, so what is it about Unreal 3 that gives them trouble on Linux?
However, with UE4 Linux is a real target on engine level which doesn't require
porting anymore (at least in theory).
And yes, UE4 will be great when games start using it, but my question was about games that are coming out this year, such as Batman: Arkham Knight, which will use UE3. It will be a much more demanding game than Xcom or the Borderlands games. If it under performs, it might be unplayable on Linux.
I may be wrong but as far as I understand the only game of relatively recent release date that runs as well or better on Linux is Left 4 Dead 2. I don't think it is as much a case of Unreal engine being the challenge, but more the current state of affairs regarding Linux porting. It's at an early stage yet.
I wasn't saying that the engine itself is broken but rather that there seems to be a problem with porting games that use that engine. It seems to be a consistent problem with Unreal Engine 3. The fact that you could even cite one game that performs well on Linux and I can mention a few more shows that it is possible to optimize a game on OpenGL and get good performance. I'm just wondering if it's possible with the Unreal Engine 3 in its current state or if the engine itself needs to be ported (which probably won't happen).