EDIT: Seems to have fixed itself with a PC restart, which I have never had to do when going through this.
Alright, so the gist of what I'm doing is basically just testing and playing around with random ELS vehicles from the website. I've done this countless times before and have never had an issue.
The issue is that none of the stage 1 and stage 2 lighting is working with ELS, however stage 3 DOES work on some vehicles, and this happens on ALL of the vehicles I downloaded (all DLC addons, yes - I did the gameconfig adjustment and all that). A bunch of different vehicles from different devs with different settings, I'm 99% certain I did the process correct (I don't use RPH for this, at least not that I remember using it, using the latest scripthook, ELS, proper file path placement for ELS VCF's, etc.) but for some reason it's not working this time.
https://gyazo.com/5f0bf88f9191d5752f4d8ef46e915a3f - This GIF shows the issue, no lighting works on any stage.
https://gyazo.com/ca268acdcdfe1d7596dab11482dcb910 - This image shows that the lighting DOES work with the cruise function.
Again, this is not an isolated issue, it happens with ALL the vehicles (with varying degrees of function) from different people and different lighting setups. They should be working, theoretically. Thanks in advance.