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[[Category:Closed-source emulators]]
Cemu
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{{Infobox emulator
|logo = Cemu-Logo.png
}}
'''[[wikipedia:Cemu|Cemu]]''' is a now open-source [[Wii U emulators|Wii U emulator]]. Its development was started circa , first released in 2015 and iteventually made open-source in 2022. It's known for being the first Wii U emulator to successfully boot a game.
==Download==
* Windows 7 (x64) or above
* macOS 12 Monterey or above
* OpenGL 4.5 or Vulkan 1.1
* RAM: 4 GB minimum, 8 GB or more recommended
The Update installation method has been reworked since 1.11.0 simplifying the installation method a lot.
To install updates and DLC on Cemu on (1.11.0)+ versions you need to follow theses these steps :
*On Cemu interface, select File -> → Install game update or DLC
*Select the meta.xml in the meta folder of the update or DLC
*Run the game to update the UI and show the update and/or DLC version
===Amiibo support===
[[Amiibo]] are hard-to-find figurines unlocking various on-disc content in select 3DS and Wii U games. They use the NFC technology. Nintendo Amiibo data is distributed online as NFC tags (.bin files). There's a regularly updated complete set of the official ones , but there are also unofficial spoofed packs on various other sites.
Recent versions of Cemu include Amiibo support. Simply go to NFC / Scan NFC Tag from file, and load the relevant .bin file. Keep in mind Amiibo support in Cemu is incomplete right now and not all figurines are compatible yet - though incompatibilities may be caused by bad Amiibo dumps as well.
===Shader caches===
When your game is loaded, check for its ID on the title bar in front of "SaveDir:" and note it down. The directory where transferable shader caches are stored is <code>.\Cemu\shaderCache\transferable</code>. They're generated the first time you play through a game and at that time cause noticeable stuttering. You can download a complete cache from places like [httphttps://wwwchriztr.redditgithub.comio/r/Cemucaches/comments/7bv7el/complete_shader_cache_collection_1110c_v2cemu_shader_and_pipeline_caches/ here] and rename them to match your game version's ID to spare yourself most of that unpleasant experience. Just keep in mind that shader caches from versions older than 1.8.0 are incompatible with later versions of Cemu.
At startup, Cemu will prepare a compiled version of that cache under <code>.\Cemu\shaderCache\precompiled</code> and that one depends on your GPU driver, so you might want to erase it if any problems or crashes when compiling shaders at startup occur.
[[File:Shadercachestuff.png|thumb|Some settings in the Nvidia control panel might help.]]
Some games' transferable caches may cause slowdowns on some graphics cards , like the GeForce GTX 970. If this is the case, you will have to generate your own shaders and delete the ones you downloaded. In the case of the GeForce, also consider deleting the .bin and .toc file in your GLCache at <code>%APPDATA%\NVIDIA\GLCache\(hexstring)\(hexstring)</code>.
==Graphic Packs==
To work around emulation bugs and other problems the way [[Dolphin]] does, "Graphic Packs" are title-specific property sheets which define advanced settings you might not be able to change in the interface. Basic rendering options including shadow resolution and quality, post-processing effects like bloom, lighting and god rays, custom anti-aliasingantialiasing, and such can be applied here. You can even use them to ''reduce'' the internal resolution for an increase in the framerate. This is not to be confused with '''Texture Packs''', which are replacement textures; Cemu doesn't support that, but it is planned.
The "Graphic Packs" themselves are folders under the <code>graphicPacks</code> directory. They can be named anything, but they should contain the "<code>rules.txt</code>" file. A bare-bones example of a "Graphics Pack", called "Bayo_1080p", would look like this:
overwriteHeight = 1080
Whenever the titleId matches the current one, Cemu will show the Graphics Pack under Options -> → Graphics Pack. If you don't know what the titleId of the game you want is, check the <code>logs.txt</code> file. You can safely delete it in the event that it gets too big for a text editor to parse.
The overwriteWidth and overwriteHeight properties used in this example will upscale the game from 720p to 1080p. But if the game doesn't have all of its textures in the specified resolution, they won't be upscaled and could look messy as a result. In this case, this problem is seen in some FMVs in the game. This is the purpose of the TextureRedefine rule.
[[Category:Wii U emulators]]
[[Category:Windows emulation software]]
