strickerje

In addition to enabling "big bnk" in the launcher as mentioned above, ensure that a copy of "d3d9.dll" is in the game's root directory. (It comes with the Platinum Patch bundle in *\Euro\Bnk\Database\ .) This fixed it for me.

when I play, 90% of cars are simply invisible. I feel like I've tried every possible combination of installation methods, even using different patches and fixes. Nothing seems to work. It also keeps cars from loading in on most races so I can't even start the race. I'm not sure what I've done wrong, but I even tried completely wiping my guest PC and installing the mods on there exactly as the instructions say and I still can't get it to work. I have everything from DirectX9 to MS Redistributables installed and I am having no luck, despite spending multiple days on attempting every combination I can think of with online sources. Please, if anyone knows the exact process of what I'm supposed to do I would greatly appreciate them sharing it.

I disappear for a few months, completely forgot about TDU:SC and then was somewhat disappointed when I seen there's been no news on it what so ever. 
Shame. Hopeful we hear something this year.  

California is well represented in The Crew 1 + 2, plus you mentioned that Los Angeles is in GTA V and Midnight Club LA.
I think the checklist for the TDU series tends to be:
* An Island that can be recreated in 1:1 scale or close enough.  Being an island means the world has no arbitrary borders and so is by nature "Unlimited"
* Coastal roads (obviously, it's an island)
* Twisty mountain roads with elevation changes
* Long highways for top speed
* Tunnels for sound appreciation
* Cities and built-up residential areas for extra immersion compared to NFS-style open worlds
* A rich/elite environment where supercars might not be too unexpected in real life
I don't see mainland Europe, America, Brasil (or any mainland) being used by TDU given that it traditionally has been based on elite islands.  Either way I can wait to find out more and explore a new location that I've hopefully never seen before.  I don't mind if they include O'ahu as a secondary or even DLC location but I wouldn't expect it to take primary focus.
 

For now, it's reserved for the new Flight Simulator only... later as DLC for TDU SC 😄