[GLES2] Skies of Arcadia: shadowed menu boxes overlay glitch

[DreaMBlazeR]

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Platform / OS / Hardware:

Lenovo A7-3300GV Android ktkat 4.4.0

Github hash: 3171cfd

Description of the Issue

For some reason, menu boxes are having strange shadows inside menu boxes, which maybe pretty hard to read. Some boxes are alright, but mainly the branch menus are bugged.

Debugging Steps Tested

• Tried to run the game in default settings, same effect.
• Used Vsyc/Synchronized Rendering/Threaded Rendering even Delay Swapping, same no fix. Toggled Widescreen... nada.
• Must not disable RTT as game CGI will not render, particularly riding boats on overworld map.
• only solution I have so far is to brighten settings, which is illogical
• happens on both retroarch and flycast app.
  Logs Gathered

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Screenshots

[flyinghead]

These are Z-fighting issues. GLES 2.0 is limited in that regard and the Mali-400 has floating point precision issues as well. There isn't much that can be done about it.

It doesn't happen with GLES 3.0.