Graphical bug on Gran Turismo 4 (Nightly v1.7.5236)

[Lozzy]

Started playing some GT4 today when I suddenly got flashbanged by garbage graphics after the start of an endurance race. I initially thought that it had something to do with the HD texture pack I was using, since I read online that there had been some unresolved bug on Tokyo R246, so I relaunched the game with no texture replacements but the bug continued to happen at inconsistent intervals.

After further testing I found out that this occurs every time my car is parallel with an opponent's. Races that I have tested so far were:

• Tokyo R246 w/ Toyota WOODONE TOM'S Supra (Endurance)
  
• Infineon Raceway (Sports Car Course) w/ Audi R8 (Driving Mission)
  
• Trial Mountain w/ Honda Castrol MUGEN NSX (Arcade)
  
• Grand Canyon w/ Peugeot 205 Turbo 16 Evolution 2 (Arcade)
  

Using Vulkan renderer w/ 4x native resolution, alongside upscaling fixes.

Needless to say, it's a little distracting! If it's an error on my end I'm not sure what could've caused it, as the game was playing fine a few days ago with no changes in settings. I'll try to provide screenshots later since I thought I was able to upload a clip of me replicating it, since it's kind of hard to explain this one with just words or still images.

---

EDIT: This was resolved by turning off Merge Sprite, located under Upscaling Fixes. Someone else will probably run into it, so there ya go.

[jesalvein]

Please post the contents of the emulog.txt file after the problem occurs. The file can be found in "My Documents\PCSX2\logs" for the installer version or in "PCSX2\logs" for the portable/binary version.

Please make sure to enclose your emulog in code tags like so (remove the empty space on the closing code tag!):
[code]
Pasted emulog goes here
[ /code]

[Lozzy]

Code:

[   67.2992] [Unsafe Settings] Mipmapping is not set to automatic. This may break rendering in some games.
[   67.2992] [Unsafe Settings]
[   67.3004] OSD [unsafe_settings_warning]:  Mipmapping is not set to automatic. This may break rendering in some games.
[   67.3004]  EE FPU Clamp Mode is not set to default, this may break some games.
[   71.1869] OSD [MemoryCardSave0]: Memory Card 'Mcd001.ps2' was saved to storage.
[   71.8497] (UpdateVSyncRate) Mode Changed to DVD NTSC.
[   71.8510] (UpdateVSyncRate) Mode Changed to DVD NTSC.
[   71.9047] cdvdLoadElf(): Unknown device in ELF path 'rom0:PS2LOGO'
[   71.9056] Failed to read ELF being loaded: rom0:PS2LOGO:
[   71.9062] ELF Loading: , Game CRC = 00000000, EntryPoint = 0xFFFFFFFF
[   72.0502] (UpdateVSyncRate) Mode Changed to NTSC.
[   72.0509] (UpdateVSyncRate) Mode Changed to NTSC.
[   76.3540] (UpdateVSyncRate) Mode Changed to NTSC.
[   76.3550] (UpdateVSyncRate) Mode Changed to NTSC.
[   76.4093] ELF Loading: cdrom0:\SCUS_973.28;1, Game CRC = 77E61C8A, EntryPoint = 0x01000008
[   76.6565] ELF cdrom0:\SCUS_973.28;1 with entry point at 0x16777224 is executing.
[   76.6577] ELF changed, active CRC 77E61C8A (cdrom0:\SCUS_973.28;1)
[   76.6584] Found 1 game patches in SCUS-97328_77E61C8A.pnach.
[   76.6589] Found 1 cheats in C:\Users\lozen\Desktop\PCSX2 v1.7\pcsx2-v1.7.4096-windows-64bit-AVX2-Qt\cheats\77E61C8A_gt3cam.pnach.
[   76.6597] Found 1 cheats in C:\Users\lozen\Desktop\PCSX2 v1.7\pcsx2-v1.7.4096-windows-64bit-AVX2-Qt\cheats\77E61C8A_triggers.pnach.
[   76.6606] Enabled patch: Widescreen 16:9
[   76.6611] Enabled patch: <unknown>
[   76.6615] Enabled patch: <unknown>
[   76.6619] OSD [LoadPatches]: 1 game patches, 2 cheat patches are active.
[   76.6623] Applying core settings...
[   76.6629] [Unsafe Settings] Mipmapping is not set to automatic. This may break rendering in some games.
[   76.6629] [Unsafe Settings]
[   76.6637] OSD [unsafe_settings_warning]:  Mipmapping is not set to automatic. This may break rendering in some games.
[   76.6637]  EE FPU Clamp Mode is not set to default, this may break some games.
[   76.6648] (GameDB) Changing VU0 clamp mode [mode=2]
[   76.6649] (GameDB) Changing VU1 clamp mode [mode=2]
[   76.6705] [GameDB] Manual GS hardware renderer fixes are enabled, not using automatic hardware renderer fixes from GameDB.
[   76.6718] [GameDB] Game requires mipmapping but it has been force disabled.
[   76.6731] [GameDB] Enabled GS Hardware Fix: mipmap to [mode=2]
[   76.6732] [GameDB] Enabled GS Hardware Fix: trilinearFiltering to [mode=1]
[   76.6745] [GameDB] Skipping GS Hardware Fix: halfPixelOffset to [mode=1]
[   76.6749] [GameDB] Enabled GS Hardware Fix: getSkipCount to [mode=16]
[   76.6753] OSD [HWFixesWarning]:  Manual GS hardware renderer fixes are enabled, automatic fixes were not applied:
[   76.6753]    halfPixelOffset = 1
[   76.6760] Updating CPU configuration...
[   76.6884] Updating GS configuration...
[   76.7009] EE/iR5900 Recompiler Reset
[   76.7740] (UpdateVSyncRate) Mode Changed to NTSC.
[   76.7751] (UpdateVSyncRate) Mode Changed to NTSC.
[   77.8888] [Pad] DS2 Config Finished - P1/S1 - AL: Off - AB: Usable - VS: Normal - VL: Normal - RB: D+A+P (0x0003FFFF)
[   82.1068] (UpdateVSyncRate) Mode Changed to NTSC.
[   82.1079] (UpdateVSyncRate) Mode Changed to NTSC.
[   82.8940] (UpdateVSyncRate) Mode Changed to NTSC.
[   82.8950] (UpdateVSyncRate) Mode Changed to NTSC.
[   83.7781] [Pad] DS2 Config Finished - P1/S1 - AL: On - AB: Locked - VS: Normal - VL: Normal - RB: D+A+P (0x0003FFFF)
[  118.2465] (UpdateVSyncRate) Mode Changed to SDTV 480p.
[  120.5982] (UpdateVSyncRate) Mode Changed to NTSC.
[  120.5990] (UpdateVSyncRate) Mode Changed to NTSC.
[  142.5367] (UpdateVSyncRate) Mode Changed to SDTV 480p.
[  193.7587] (VMManager) Pausing...
[  207.1610] Add 203 seconds play time to SCUS-97328 -> now 695197
[  207.3648] Skipping updating pipeline cache 'C:\Users\lozen\Desktop\PCSX2 v1.7\pcsx2-v1.7.4096-windows-64bit-AVX2-Qt\cache\vulkan_pipelines.bin' due to no changes.
[  207.4180] Scanning C:\ROMs\ps2 (recursively)
[  214.2490] Releasing host memory for virtual systems...

[Lozzy]

UPDATE: Turning off Merge Sprites fixes this problem. I had it on to fix the misaligned wheel textures during replays while I was on older builds iirc

Weird how I need it off now as of the recent Nightly, but that's the fun with upscaling fixes I guess