[BUG]: Onimusha 3 - Shadows getting stretched sometimes when upscaling

[bslenul]

Describe the Bug

When using upscaling 2x or higher the shadows sometimes get "stretched":

oni3.mp4

The game is mentioned in #3692 but it seems to be something different (flickering).

Reproduction Steps

While having upscaling set to 2x or higher: load the save file from that memory card: oni3.zip and simply run around and swing your weapon.

Expected Behavior

No response

PCSX2 Revision

v2.7.407

Operating System

Windows 11

If Linux - Specify Distro

No response

CPU

i5-12400F

GPU

Nvidia RTX 3060 Ti (drivers 610.47)

GS Settings

No response

Emulation Settings

No response

GS Window Screenshots

No response

Logs & Dumps

oni3_gsdumps.zip

[bslenul]

And got a HW renderer issue a bit later: the blobs in the sewer have their textures completely glitched, that one affects HW 1x however (SW is still fine) so maybe not related?

oni3_blobs.mp4

Onimusha 3 - Demon Siege_SLUS-20694_20260611190050.gs.zip

edit: Memory card to reproduce: oni3.zip, just load save 2, get out of the room and go right until you reach the door, you should see the 2 enemy blobs once you enter.

[bslenul]

Messed a bit with manual HW fixes and it looks like "CPU Sprite Render Size" fixes the shadow bug when set to 4 or above + Blended Sprites/Triangles (shadow disappear completely with the non-blended mode on one of my GS dumps):

oni3_hw_settings.mp4

Idk what these settings do tbh so I'm not even sure this is a proper fix or if it can break rendering elsewhere but wanted to share my findings anyway.
I'll add

    cpuSpriteRenderBW: 4 # Fixes upscaled shadows.
    cpuSpriteRenderLevel: 2 # Needed for above.

to my db file and play a bit with it, hopefully it doesn't break anything.

Couldn't find any setting that fixes the blobs textures however.

[prafullpcsx2]

First problem can be fixed by using Half pixel offset Normal (vertex) but it causes other issues. Your option of using CPUspriterender settings seems to be a good option if it doesn't cause other issues with the game. Second problem is caused by this commit:-

#13428

[bslenul]

Your option of using CPUspriterender settings seems to be a good option if it doesn't cause other issues with the game.

Sadly I just got an issue with these settings, I played a few more hours and it looked promising until I reached this boss:

oni3_shadow_bug.mp4

The character's shadow is completely misaligned and cut.

GS dump ("CPU Sprite Render Size" to 4 or higher + Blended Sprites/Triangles for the bug to appear): Onimusha 3 - Demon Siege_SLUS-20694_20260614004326.gs.zip

[prafullpcsx2]

First issue is caused by this commit:-

#13521