I want to add to this as I have encountered it as well. I've attached a screenshot of the same thing happening in the cieldalaes.

Date of issue: 7-8-2024
Time of issue: Around noon, 12:00 pm
Frequency: Constant
World name: Maduin
Character name@Home World name: Solrun Feydja @ Maduin
Retainer name: N/A
NPC name: N/A
Monster name: N/A
Class/Level: Fisher 96
Party or solo: Party
In-game time: 1:30 am ET
Area and coordinates: Indigo route - The Cieldalaes
Housing: N/A
Steps:
1. Load into ocean fishing
2. Observe graphical errors in the background.



As with the original poster, I had several others on the boat report seeing it, but others did not.

■ PC Specs

-=-=-=-=-=-=- System Information -=-=-=-=-=-=-

SYSTEM_OS Windows 11 Home 64-bit (6.2, Build 9200) (22621.ni_release.220506-1250)
SYSTEM_CPU 13th Gen Intel(R) Core(TM) i9-13900KF (32 CPUs), ~3.0GHz
SYSTEM_CORE_NUM SYSTEM_CORE_LOGIC 32 SYSTEM_CORE_PHYSICS 24
SYSTEM_BIOS 2603
SYSTEM_LANGUAGE English (Regional Setting: English)
SYSTEM_MEMORY 32580.992MB
SYSTEM_VIRTUAL_MEMORY 134217727.875MB
SYSTEM_PAGE_FILE 37548.992MB
SYSTEM_STORAGE C:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 476.081GB SYSTEM_FREEDISC_SPACE 51.447GB
SYSTEM_STORAGE D:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 1765.344GB SYSTEM_FREEDISC_SPACE 335.432GB
SYSTEM_STORAGE E:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 465.251GB SYSTEM_FREEDISC_SPACE 104.518GB
SYSTEM_STORAGE G:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 931.496GB SYSTEM_FREEDISC_SPACE 372.652GB
SYSTEM_DIRECTX_VERSION DirectX 12
SYSTEM_GRAPHICS NVIDIA GeForce RTX 4070 Ti
SYSTEM_GRAPHICS_DEVICE \\.\DISPLAY1
SYSTEM_GRAPHICS_CHIP NVIDIA GeForce RTX 4070 Ti
SYSTEM_GRAPHICS_MAKER NVIDIA
SYSTEM_GRAPHICS_VRAM 11996.000 MB
SYSTEM_GRAPHICS_SHARED_VRAM 16290.496 MB
SYSTEM_GRAPHICS_DAC Integrated RAMDAC
SYSTEM_GRAPHICS_DISPLAY_MODE 2560 x 1440 (32 bit) (120Hz)
SYSTEM_GRAPHICS_DRIVER C:\Windows\System32\DriverStore\FileRepository\nv_dispig.inf_amd64_362f239e9bd019fc\nvldumdx.dll,C:\Windows\System32\DriverStore\FileRepository\nv_dispig.inf_amd64_362f239e9bd019fc\nvldumdx.dll,C:\Windows\System32\DriverStore\FileRepository\nv_dispig.inf_amd64_362f239e9bd019fc\nvldumdx.dll,C:\Windows\System32\DriverStore\FileRepository\nv_dispig.inf_amd64_362f239e9bd019fc\nvldumdx.dll
SYSTEM_GRAPHICS_DRIVER_VERSION 31.00.0015.5186
SYSTEM_GRAPHICS_DRIVER_DATE 3/11/2024 20:00:00
SYSTEM_GRAPHICS_DRIVER_LANGUAGE English
3.0
SYSTEM_GRAPHICS_PIXEL_SHADER 3.0
SYSTEM_GRAPHICS_VERTEX_TEXTURE SYSTEM_SUPPORT
SYSTEM_GRAPHICS NVIDIA GeForce RTX 4070 Ti
SYSTEM_GRAPHICS_DEVICE \\.\DISPLAY2
SYSTEM_GRAPHICS_CHIP NVIDIA GeForce RTX 4070 Ti
SYSTEM_GRAPHICS_MAKER NVIDIA
SYSTEM_GRAPHICS_VRAM 11996.000 MB
SYSTEM_GRAPHICS_SHARED_VRAM 16290.496 MB
SYSTEM_GRAPHICS_DAC Integrated RAMDAC
SYSTEM_GRAPHICS_DISPLAY_MODE 2560 x 1440 (32 bit) (120Hz)
SYSTEM_GRAPHICS_DRIVER C:\Windows\System32\DriverStore\FileRepository\nv_dispig.inf_amd64_362f239e9bd019fc\nvldumdx.dll,C:\Windows\System32\DriverStore\FileRepository\nv_dispig.inf_amd64_362f239e9bd019fc\nvldumdx.dll,C:\Windows\System32\DriverStore\FileRepository\nv_dispig.inf_amd64_362f239e9bd019fc\nvldumdx.dll,C:\Windows\System32\DriverStore\FileRepository\nv_dispig.inf_amd64_362f239e9bd019fc\nvldumdx.dll
SYSTEM_GRAPHICS_DRIVER_VERSION 31.00.0015.5186
SYSTEM_GRAPHICS_DRIVER_DATE 3/11/2024 20:00:00
SYSTEM_GRAPHICS_DRIVER_LANGUAGE English
3.0
SYSTEM_GRAPHICS_PIXEL_SHADER 3.0
SYSTEM_GRAPHICS_VERTEX_TEXTURE SYSTEM_SUPPORT
SYSTEM_SOUND Digital Audio (S/PDIF) (High Definition Audio Device)
SYSTEM_SOUND_DEVICE_ID {2B6A8280-85A2-4F98-8864-E98F62A515A2}
SYSTEM_SOUND_DEVICE_NAME HdAudio.sys
SYSTEM_SOUND_DRIVER_VERSION 10.0.22621.2506
SYSTEM_SOUND_DRIVER_LANGUAGE English
SYSTEM_SOUND_DRIVER_DATE 10/18/2023 20:00:00
SYSTEM_SOUND Speakers (High Definition Audio Device)
SYSTEM_SOUND_DEVICE_ID {E3D67D38-46AD-48BD-B5F5-041DCC3FF133}
SYSTEM_SOUND_DEVICE_NAME HdAudio.sys
SYSTEM_SOUND_DRIVER_VERSION 10.0.22621.2506
SYSTEM_SOUND_DRIVER_LANGUAGE English
SYSTEM_SOUND_DRIVER_DATE 10/18/2023 20:00:00
SYSTEM_INPUT {6F1D2B60-D5A0-11CF-BFC7444553540000}
SYSTEM_INPUT_NAME Mouse
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 3 SYSTEM_GAMEPAD_BUTTON 8 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {6F1D2B61-D5A0-11CF-BFC7444553540000}
SYSTEM_INPUT_NAME Keyboard
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 128 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {E5E3D980-8D7C-11EE-8001444553540000}
SYSTEM_INPUT_NAME Blue Snowball
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 7 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {E5E49CD0-8D7C-11EE-8004444553540000}
SYSTEM_INPUT_NAME AURA LED Controller
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {76B38BF0-EBAA-11EE-8001444553540000}
SYSTEM_INPUT_NAME USB DEVICE
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 3 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {76B3B300-EBAA-11EE-8002444553540000}
SYSTEM_INPUT_NAME USB DEVICE
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 8192 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {872A9830-8D80-11EE-800F444553540000}
SYSTEM_INPUT_NAME Corsair composite virtual input device
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 1024 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {76B3B300-EBAA-11EE-8003444553540000}
SYSTEM_INPUT_NAME USB DEVICE
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {A6A7B410-D7F2-11EE-8002444553540000}
SYSTEM_INPUT_NAME Virtual HID
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {64403270-D831-11EE-8008444553540000}
SYSTEM_INPUT_NAME Virtual HID
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {64405980-D831-11EE-8009444553540000}
SYSTEM_INPUT_NAME Virtual HID
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {E5E4C3E0-8D7C-11EE-8007444553540000}
SYSTEM_INPUT_NAME Corsair Gaming MM800 RGB POLARIS
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {E130FBF0-3495-11EF-8001444553540000}
SYSTEM_INPUT_NAME USB Gaming Mouse
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 4096 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {E1312300-3495-11EF-8002444553540000}
SYSTEM_INPUT_NAME USB Gaming Mouse
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0