Emulator

I know :/ I've been sitting on this issue for months, because it cleary looks like one of these horrible drivers issues that have to be worken around. Eventually I thought it might be worth being reported anyway :)

Weeeeeeeell, I could just tell you to use the software renderer, get a real graphics card, or use a better OS that has good GPU drivers.

Dolphin has no obligation to fix it and may never fix it if it compromises some other part of the emulator. Despite what I said viewpoint, I'm absolutely glad that you reported the issue; we need to know this kind of stuff in case there is an easy work-around or something.

Luckily for everyone, I don't make that decision myself and pinged Armada who did that other PR. There's also the potential that endrift could come up with a fix.

So, instead of being an asshole and complaining about video drivers, I'm going to put the fifolog up on fifoci so we can figure out what's going on, and maybe send a test case in to try and get this fixed. There's obviously something weird going on.

For what is worth, this is still present with Armada's latests depth-related PR (https://github.com/dolphin-emu/dolphin/pull/4085, https://github.com/dolphin-emu/dolphin/pull/4139).

I recorded a video that demonstrates the issue (Dolphin 5.0 438, Fast-Depth enabled) : https://youtu.be/OFgExeypegg

Still looks like a driver bug anyway ¯_(ツ)_/¯

Other levels with very visible problems are Wario Colosseum (the swamp water at the bottom of the level appears in front of everything), Bowser's Castle (moat appears in front of everything, props are missing), Dino Dino Jungle (the entire jungle to the right of the race course is missing), and Rainbow Road (super broken).

This is still present on master (1c9d11c0e9a6559d4bb449e7a484f5de91271dbb). Does anyone with knowledge of the graphics pipeline have any clues on where to start looking, if someone wanted to fix this?

If you capture a FIFO log I can take a look at it and fix it.

I thought ligfx was implying that this issue wasn't just on MacOS. There's not a lot of room to implement workarounds for bugged drivers, so you'll have to turn off fast depth on MacOS.

Also note that this only happens on the Intel driver. I have a macbook with an Nvidia GPU that works fine.

Ah, nope, it's just a macOS Intel problem.

It's not a fast-depth bug though—the same problems appear regardless of whether Fast Depth is enabled or disabled. Any idea where the problem might be?

Even if fast depth doesn't fix it, the problem is still the Intel drivers, this isn't going to get fixed any time soon.

This should be merged into #10072 "Dual source blending fallback removed - graphical problems on mobile devices in Mario Kart: Double Dash, Resident Evil 4 and more," and that should be updated to cover mobile devices + the shitty macOS Intel driver.

Are you sure? This problem looks different visually, and it started happening before we removed the dual source alpha blending fallback.

Hmm, that's what my old notes said, I'll check again.

For what is worth, these depth issues can now be worked around by using the Vulkan backend on macOS.

(Tested on Dolphin 5.0-11830)

There seems to be a PR for this

https://github.com/dolphin-emu/dolphin/pull/6219