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Emulator Issues #14003

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Falling through solid floors in Mario Sunshine since 2603

Emulator Issues #14003: Falling through solid floors in Mario Sunshine since 2603

Added by Fawe about 1 month ago. Updated 4 days ago.

Status:
New
Priority:
Normal
Assignee:
-
% Done:

0%

Operating system:
N/A
Issue type:
Bug
Milestone:
Regression:
No
Relates to usability:
No
Relates to performance:
No
Easy:
No
Relates to maintainability:
No
Regression start:
Fixed in:

Description

Game Name?

[Super Mario Sunshine]

Game ID? (right click the game in the game list, Properties, Info tab)

[GMSP01]

MD5 Hash? (right click the game in the game list, Properties, Verify tab, Verify Integrity button)

[72c4860d8555d5e790628e348abc244d]

What's the problem? Describe what went wrong.

[Since the newest Dolphin update (2603) I keep falling through solid floors in Super Mario Sunshine. Specifically this seems to happen in Bianco Hills Episode 6 "The Secret of the Dirty Lake". Once you enter the secret level, there is a spinning star-shaped platform that is supposed to have a 1-Up on it. Since the update, the 1-Up appears to be underneath/inside the platform. If you try to step onto the platform, Mario will fall right through and die. He also keeps falling through the glass panels of the moving block right after the star-shaped platform. Rolling back to an older version fixes the problem. This only happens in the newest version of Dolphin. ]

What steps will reproduce the problem?

[Updating Dolphin to version 2603, playing Super Mario Sunshine and entering the secret level in Bianco Hills Episode 6 "The Secret of the Dirty lake", then stepping on the star-shaped platform near the beginning of the level. ]

Is the issue present in the latest development version? For future reference, please also write down the version number of the latest development version.

[Yes - version 2603-65]

Is the issue present in the latest release? For future reference, please also write down the version number of the latest release.

[Yes - version 2603]

If the issue isn't present in the latest release, which is the first broken version? (You can find the first broken version by bisecting. Windows users can use the tool https://forums.dolphin-emu.org/Thread-green-notice-development-thread-unofficial-dolphin-bisection-tool-for-finding-broken-builds and anyone who is building Dolphin on their own can use git bisect.)

[2603]

If your issue is a graphical issue, please attach screenshots and record a three frame fifolog of the issue if possible. Screenshots showing what it is supposed to look like from either console or older builds of Dolphin will help too. For more information on how to use the fifoplayer, please check here: https://wiki.dolphin-emu.org/index.php?title=FifoPlayer

[The first screenshot and FIFO log show Mario falling through the solid floor and the 1-Up being seen as a question mark next to him in the latest Dolphin version. The second screenshot and FIFO log show what it's supposed to look like (using verison 2512). ]

What are your PC specifications? (CPU, GPU, Operating System, more)

[CPU: AMD Athlon(tm) II X4 645 Processor
GPU: NVIDIA GeForce GTX 750 Ti (2 GB)
OS: Windows 10 Home (22H2)
API: Vulkan]

Is there anything else that can help developers narrow down the issue? (e.g. logs, screenshots,
configuration files, savefiles, savestates)

[Attached screenshots, FIFO logs and my save file for the game. ]


Files

Screenshot1.jpg (165 KB) Screenshot1.jpg Visible bug in version 2603 Fawe, 03/16/2026 10:55 AM
FIFOlog1.dff (4.36 MB) FIFOlog1.dff FIFO log for screenshot 1 Fawe, 03/16/2026 10:56 AM
Screenshot2.jpg (215 KB) Screenshot2.jpg What it's supposed to look like (version 2512) Fawe, 03/16/2026 10:56 AM
FIFOlog2.dff (4.75 MB) FIFOlog2.dff FIFO log for screenshot 2 Fawe, 03/16/2026 10:57 AM
01-GMSP-super_mario_sunshine.gci (56.1 KB) 01-GMSP-super_mario_sunshine.gci My save file (use in-game File 3) Fawe, 03/16/2026 10:57 AM

Updated by Billiard26 30 days ago Actions #1

I can't reproduce this. The mushroom appears appropriately here.

Are you using a 60 FPS code or some other kind of game mod?

It sounds like 2512 works and 2603 does not work for you? Can you figure out the very first development version after 2512 that produces the issue?

Updated by JMC4789 30 days ago Actions #2

Also can't reproduce it.

Updated by JMC4789 30 days ago Actions #3

I have a feeling this is because of the FMA changes, and your processor doesn't support FMA and is using the alt-path.

Updated by Fawe 29 days ago Actions #4

Billiard26 wrote in #note-1:

I can't reproduce this. The mushroom appears appropriately here.

Are you using a 60 FPS code or some other kind of game mod?

It sounds like 2512 works and 2603 does not work for you? Can you figure out the very first development version after 2512 that produces the issue?

I'm not using any codes, hacks or mods. Just the clean PAL version of the game, with the standard settings.
JMC4789 might be onto something, as the first development version where the glitch happens seems to be 2512-211.
It's description says "Jit: Implement error-free transformation for single-precision FMA".
As of the latest hotfix (2603a) and the latest development version (2603-81) the glitch still occurs for me.

Updated by JosJuice 29 days ago Actions #5

JMC, could you try changing this line to const bool use_fma = false; and then check if you can reproduce the issue: https://github.com/dolphin-emu/dolphin/blob/de44626d23a85aa3cc07260f6f97e64f36600652/Source/Core/Core/PowerPC/Jit64/Jit_FloatingPoint.cpp#L369

Updated by Billiard26 4 days ago Actions #6

JMC and I cannot reproduce this even with the const bool use_fma = false; change.

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