So in a way the game pushes the hardware beyond what we assumed where the hard limits.'Īnecdotally, I've noticed while playing Breath of the Wild on Wii U that it takes an unusually long time to load after pulling up the OS's Home menu. 'Every public technical specification about Wii U states that the GPU only supports 16 texture mapping units per shader stage. I asked Exzap if he's already encountered anything interesting about how Breath of the Wild was programmed, and he said one thing did stick out. There are likely smaller, more nefarious bugs hiding in Breath of the Wild's vast world, and there's a very good chance that Nintendo used its hardware in ways no other Wii U game has before. Right now, Link's suite of rune abilities don't work at all in Cemu, enemies sometimes fall through floors, grass often doesn't render and lighting effects are wrong. My guess is that we will see small incrementals in speed for almost every future Cemu release.' Additionally, Cemu is rather young so there is also optimization potential almost everywhere in the code. 'That said, CPU bound games usually profit from improvements to the recompiler/JIT core. 'I don't yet know precise details about why the game is running slow,' he wrote. Exzap wrote that it was too early to say what Breath of the Wild will need, specifically.

I've previously written about how Dolphin's contributors made massive performance improvements to some games with new code.įor Breath of the Wild to run at its intended 30 frames per second, Cemu will likely need both general and specific improvements. Some emulator development will improve performance and compatibility for all games, while some fixes more accurately emulate specific attributes of the original hardware that individual games used in a particular way. The GameCube/Wii emulator Dolphin, which has been in open source development since 2008 (and around since 2003) only recently reached the milestone of being able to boot every single GameCube game. Understanding the ins and outs of a piece of hardware as complex as the Wii U is a process that can take years.

Dolphin emulator not running at 100