Extra boost went in optimising rendering quality on higher-end devices (refraction effects, real reflection in waters/shiny floors, enabled FXAA antialiasing, enabled tree swaying, etc.)
Actually, you probably know already because It’s done and it works great. You can all check it out by downloading The Talos Principle from the iOS App Store. So much for the shock value, but the story on how Serious Engine was able to support Metal API and push the boundaries of iOS devices does make for a compelling read. Karlo Jež, one of Croteam’s senior programmers, tells the story.
“I was just about finished with my work on single pass and multi-GPU rendering optimizations for VR titles and getting ready to start working on the next project. Alen (Croteam’s CTO) walked into my office and asked me if I knew anything about Metal API. I said ‘Yes. I know it’s out there’.”
“Just one short month later, the first builds were successfully tested on multiple iOS devices using Metal API.”