For those who want to change the flag:
1) Create a "skins" folder in "C:\Program Files (x86)\Steam\steamapps\common\assettocorsa\content\tracks\jeddah21"; >>
2) Inside that folder create a "cm_skins" folder; >>
3) Inside that create another folder with whatever name you want; >>
4) Inside that folder put whatever flag or image you want and rename it "canadaflag";
5) Then just change the skin from content manager when selecting the track.
For the replacement to work on the extentions "Jeddah F1 2021" and "Jeddah F1 2022" you will need to edit the "ext_config-pyyer-jeddah-2022-environment" located in "C:\Program Files (x86)\Steam\steamapps\common\assettocorsa\content\tracks\jeddah21\jeddah21_2022\extension"
For example, to replace the flag you will need to remove these lines:
[SHADER_REPLACEMENT_...]
ACTIVE = 1
DESCRIPTION = Replace flag
MATERIALS = canadaflag
RESOURCE_0 = txDiffuse
;RESOURCE_FILE_0 = ../jeddah21_2022/extension/textures.zip::FlagWeRaceAsOne.dds
RESOURCE_FILE_0 = ../jeddah21_2022/extension/textures.zip::FlagFIA.dds
(there are other available skins for this track, you can download those and then just change the "canadaflag" image)
The road texture, walls, fences and trees are exactly the same as all of the other tracks I make, can you confirm you are running the latest version?