Terrain glitch in Vigilante 8

[franksouza183]

The video shows (sound muted)

The same glitch happens with Vigilante 8 Second Offense (even worse) I don't know about other games.

With software renderer the 3D gameplay works fine, but has a lot of other glitches (menus, black screen).

Tested in every setting possible as I could, as vulkan (main driver + core), OpenGL, SDL2, PGXP on - off, internal resolution, fullscreen, windowed, etc.. in every core settings menu, as well in retroarch config menu

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OS: Manjaro updated (01-10-2018) Kernel 4.14 i7-3770 3.40 GHz Radeon R9 380 2GB SSD

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retroarch 1.7.0 libretro-beetle-psx / hw from git (01-10-2018)

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VGA: Advanced Micro Devices, Inc. [AMD/ATI] Tonga PRO [Radeon R9 285/380] (rev f1)
OpenGL driver: radeonsi
Kernel driver: amdgpu
name of display: :0.0
display: :0  screen: 0
direct rendering: Yes
Extended renderer info (GLX_MESA_query_renderer):
    Vendor: X.Org (0x1002)
    Device: AMD Radeon (TM) R9 380 Series (TONGA / DRM 3.19.0 / 4.14.10-2-MANJARO, LLVM 6.0.0) (0x6939)
    Version: 17.4.0
    Accelerated: yes
    Video memory: 2017MB
    Unified memory: no
    Preferred profile: core (0x1)
    Max core profile version: 4.5
    Max compat profile version: 3.0
    Max GLES1 profile version: 1.1
    Max GLES[23] profile version: 3.1
OpenGL vendor string: X.Org
OpenGL renderer string: AMD Radeon (TM) R9 380 Series (TONGA / DRM 3.19.0 / 4.14.10-2-MANJARO, LLVM 6.0.0)
OpenGL core profile version string: 4.5 (Core Profile) Mesa 17.4.0-devel (git-74e1d6e20c)
OpenGL core profile shading language version string: 4.50
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL version string: 3.0 Mesa 17.4.0-devel (git-74e1d6e20c)
OpenGL shading language version string: 1.30
OpenGL context flags: (none)
OpenGL ES profile version string: OpenGL ES 3.1 Mesa 17.4.0-devel (git-74e1d6e20c)
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.10

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Dump here

[rz5]

I think this is a bug present in mednafen's psx module as well.

[ghost]

Yep, one of the handful of bugs remaining in standalone.

[franksouza183]

New clues: This glitch also happens in PCSXR PGXP, when the option configuration >> CPU >> Wipeout MemHack is enabled. To see it, don't load states.

[keknyJi]

In Vigilante 8: Second Offense the bug disappears until the end of a current map if you save and load a state or change texture filtering to any other (you can change it back after that). The bug occurs in OpenGL mode but not in software mode. In Vigilante 8, the bug occurs in both software and OpenGL and doesn't disappear after mentioned actions,

[MortimerScharf]

With the help of some users over at the Libretro Discord I was able to test several settings (different renderers (including Vulkan and Software)) and the glitch persists.