Part flickering very fast, shadows disappearing

Help and Feedback Scripting Support
#1

I have a game that where you can build a vehicle and drive it. problem is, when driving the vehicle, after a random time, the entire vehicle, its parts, and its weapons start to flicker and lose its shadows.
I tried setting lighting tech to shadowmap to see if itll help, but it wont

Gif of problem

It also randomly deletes the barrels of my guns, which i kinda need those.

Any help or advice would be great.

#2

It’s probably because you’re using inverted faces. Try removing them or turn their cast shadow off and see if that helps.

#3

Nope. still does it with the cast shadow off