Well, here's an unexpected combination... Toyota's Toyota Connected North America unit is developing a console-grade open-source game engine. Making it even more unusual is their engineering choices of building around the Flutter toolkit and in turn the Dart programming language. This new game engine creation is called Fluorite.

Toyota Connected North America is Toyota Motor Corporation's subsidiary founded in collaboration with Microsoft for working on in-vehicle software, AI, and related tech initiatives. Toyota Connected developers announced at FOSDEM 2026 their Fluorite game engine as a "console grade" engine built around Flutter and Dart. They were going with Flutter to leverage its rich UI toolkit and for "building stunning interactive experiences." Fluorite also makes use of Google's Filament 3D rendering engine.