Tales of Destiny 2 - Menu/Font Z-fighting and flickering on Mali-G68 w/ Vulkan

[SeongGino]

Game or games this happens in

ULJS00097 - Tales of Destiny2

What area of the game

Any time the menu is brought up in exploration (Triangle), or menu screens in battle (selecting an option after pressing Triangle).

What happens

When using Vulkan on this GPU, the fonts (and other aspects of the menu) clash and seem to be rapidly flickering in menus, which makes it borderline impossible to navigate and select options in the menus, as is shown in this device recording:

https://github.com/user-attachments/assets/e3324525-38ec-49e3-ae84-59fb5ab3d568

This also happens when using the menu during battles, i.e. Artes or Items submenus, etc. This issue does not occur using OpenGL (though is not ideal, as OGL can't be used on a per-game basis).

This issue does not seem to appear in Tales of Rebirth (ULJS00132, same development team & another PS2->PSP port).

What should happen

Menus should render properly without flickering or depth sorting issues.

GE frame capture

ULJS00097_0001.ppdmp.zip

Platform

Android

Mobile device model or graphics card (GPU)

Retroid Pocket 4 (Base, non-Pro), Mali-G68 MP4

PPSSPP version affected

v1.17.1-1250-g049dd8bb7

Last working version

n/a

Graphics backend (3D API)

Vulkan

Checklist

• [X] Test in the latest git build in case it's already fixed.
• [X] Search for other reports of the same issue.
• [X] Try resetting settings or older versions and include if the issue is related.
• [X] Try changing graphics settings to determine if one causes the glitch (especially speed hacks or enhancements/replacements.)
• [X] Include logs or screenshots of issue.