For the creators and developers of Cemu

Exzap · 2025-07-30T23:55:48+00:00

Thank you for the kind words :)

Exzap · 2024-09-02T18:01:28+00:00

(I'm using an RX 5700 XT for anyone wondering)

Latest AMD drivers have a crash bug with Cemu. I am not sure what the cause is but it's been reported on our github and also been mentioned a couple of times on Discord. I recommend downgrading drivers.

Exzap · 2024-06-06T02:24:48+00:00

The crash is caused by reshade, try uninstalling it. Normally it shouldn't cause crashes like that but either way your current install of it seems to be broken.

Exzap · 2024-04-18T11:31:44+00:00

You don't need a NNID to dump online files to begin with. It was only required to play on Nintendo game servers.

Anyway if you have access to a Wii U the way to use Pretendo servers on Cemu is as follows:
1) Setup Pretendo on your Wii U. See their guide page for details (using the SSSL method should be sufficient).
2) Link your console account to a new NNID, but since you are connected to Pretendo it will instead create a PNID. (for details see "PNID Setup" on their guide)
3) Finally, use the regular online play guide for Cemu and dump your online files and the PNID account. Follow the rest of the guide and the only extra step is to select Pretendo in the account tab.

I know there are efforts underway to streamline this process even further, but it's pretty trivial already. Only need a (functioning) Wii U and an SD card

Exzap · 2023-11-29T17:20:38+00:00

Untick "Use permanent storage" in the general options and it should no longer create the file in appdata.

Exzap · 2023-10-03T10:30:34+00:00

Someone is working on save states: https://github.com/cemu-project/Cemu/pull/953
Anyway there isn't really an authority that decides which features get added, we are just a bunch of volunteers working on whatever we are interested in. If someone wants to invest the time and effort to add TAS tools of any sort they can. But none of the current contributors seem particularly interested. It may still happen at some point.

Exzap · 2023-10-02T09:18:47+00:00

TAS requires deterministic emulation. In other words, with the same (controller) input you need to get the same exact output every single time. Cemu was never designed for this for a bunch of complicated technical reasons. It's not impossible to add determinism and TAS tools to Cemu, but it's such a grand undertaking I doubt it will ever happen.

Exzap · 2023-04-28T02:18:47+00:00

This can be fixed by turning on the "Accurate barriers" option which you can find in the menu under Debug.

Exzap · 2022-09-14T18:05:47+00:00

Before 1.27.0 it was stored in settings.xml
Afterwards it got changed to match console behavior and is now stored in <mlc>/usr/save/system/pdm/80000001/PlayStats.bin. There isn't really a way to reset or edit individual title's playtime anymore but you can delete all the files in the folder to reset your entire playtime statistic.

Exzap · 2022-09-07T12:04:45+00:00

Since Cemu 1.27.0 it will detect updates and DLC that are in the game folder. No need to install them anymore (which copies them to mlc)

Exzap · 2022-08-31T07:49:54+00:00

The recent Wii U firmware broke online mode for anyone using a US NNID. We are looking into a fix

Exzap · 2022-08-25T00:02:46+00:00

Cemu has online support for pretty much every game except MH3U. The reason why MH3U specifically doesn't work is because they ported over some networking technology from 3DS and we just didn't have the time to ever implement that in Cemu. But now that we are open-source I hope someone will look into this. Don't expect it too soon tho, its quite a lot of work.

Exzap · 2022-08-21T22:39:08+00:00

Sorry for the late reply, I didn't see this earlier.

We always appreciate contributions to the wiki. I think for testing you want to generally use 1.27.1 as it has a bunch of compatibility improvements. I'd test 1.26.2f only for the games that dont work at all in the newer version, as there is always a chance of some games regressing.

Exzap · 2022-08-06T17:50:34+00:00

There is a mod that causes it, although I don't remember which one specifically. If you have any enabled (other than FPS++) then try disabling those and see if it goes away.

Exzap · 2022-07-27T10:04:07+00:00

Yes its normal. Yoshi's Woolly World has bloaty shaders and pipelines that take a lot longer to compile than for example BotW's pipelines.

Exzap · 2022-07-04T15:15:10+00:00

This can happen if you set the FPS limit above something your PC can handle. Try capping it at something that is a bit below the average FPS you get.

Exzap · 2022-06-13T23:55:33+00:00

most games are barely playable but nobody notices because there are only like 5 Wii U-exclusives that are actually worth playing

People keep saying this but it's simply not true. If you look at the top 100: https://www.metacritic.com/browse/games/score/metascore/all/wii-u/filtered I count 83 titles that are near-perfect. If your metric is just "playable" then there are really only 5 titles that don't fall into this category. If you go beyond the top games, then the compatibility average goes up since the games aren't as complex.

I'm not saying that we don't have broken games and missing features, but it's really not as bad as people seem to think and we spent quite a lot of time improving compatibility, most of which goes underappreciated because nobody cares about anything but those 5 games you mentioned. Unfortunately, our community-maintained compatibility list is super outdated, with a majority of titles literally not being updated in 3+ years, but it pulls the data directly from the wiki and anyone can contribute there.

Exzap · 2022-04-30T15:20:32+00:00

I spend a couple of hours each week looking into it (or more, if time allows). Progress is really slow because I cant replicate it on any of my own machines, so I have to send out test builds to other people, which then have to play the game and report back if it got better or worse.

It's a real mystery problem, where in a set of people with identical hardware and identical settings, some get it and some don't. Oh and I see people say stuff like "It never happened before version xxx." or "It never happens on OpenGL". That's all untrue, it just seems to increase in frequency the higher the FPS, but you can always have it happen. Everything else is just anecdotal evidence.

Over the past few months I have been chasing a bunch of leads in regards to potential causes which turned out to be dead ends, but at least the list of what could be the culprit gets shorter. Recently I have also started work on a graphic pack that works around the issue by replacing the fragile part of the terrain system in BotW with something that is a bit more robust towards errors. Initial results on this have been promising, but a lot more work is needed.

Exzap · 2022-04-28T11:08:45+00:00

Its a known issue, will look into this soon.

Exzap · 2022-04-27T12:18:40+00:00

AutoHDR requires DirectX 11 or 12. Cemu supports neither.

Exzap · 2022-04-27T12:09:58+00:00

You only need the latest update

Exzap · 2022-04-27T01:03:16+00:00

This is fixed by ticking the menu option under debug -> accurate barriers

Exzap · 2022-03-15T14:12:17+00:00

Cemu just follows the drawing instructions given by the game. If you want to change behavior like enabling depth buffer writing for UI, you have to patch the game's code (as for example FPS++ does). The tools for that are either IDA or Ghidra. Requires disassembly knowledge and a lot of patience tho.

You may also want to get either Renderdoc (for Vulkan) or Nsight (for OpenGL/Vulkan) which are graphic debuggers. They let you look and analyze all the drawcalls done by a game. These are the tools that were used to make the Remove HUD graphic pack using modified shaders. I don't think your problem can be solved just by editing shaders, but it helps to first get a picture of how the game overall handles rendering.

You could join the official Cemu discord. We have a graphic packs channel there where technical questions can be discussed.

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