why do i see this weird brown line on my screen and it moves away when i steer to one or another side
If you still want to be able to use that mod online, just move the driver cam enough forward.
Else, LMGTFY as someone has already bothered to (you'll need to delete data.acd files after).
Still, understand that when you point these kind of problems you should indicate when they are specific to a mod (not official content). And if that mod isn't here in RD, well, there could be reasons for that (quite obvious in this case). PM the creators with your concerns, or look for support where you downloaded it, as other users might have posted the same question or a fix as the one above.
I'm just suggesting that when the problem relies inside data.acd files on a mod, the best solution will always be the one provided by the person who made that content. Because a local user fix will cause mismatched checksums online, and everyone would benefit if the mod creator updated his work (which is more likely if you directly voice your concerns).
[HIDE_OBJECT_1]
NAME=DRIVER:Driver_Body_SUB0
[HIDE_OBJECT_1]
NAME=DRIVER:GEO_Driver_FACE
And btw, sorry for not pointing the obvious. For mods that have a \data folder instead of a encrypted data.acd file, in assettocorsa\content\cars\<target car>\data\driver3d.ini just replace:
Code:[HIDE_OBJECT_1] NAME=DRIVER:Driver_Body_SUB0
with:
Code:[HIDE_OBJECT_1] NAME=DRIVER:GEO_Driver_FACE