We can apply active physics to a NPC vehicle by setting bit 3 at CVehicle+0x36 (TypeStatus) (as I did in Real Traffic Fix mod), but active physics cost a lot of CPU (60 to 40 FPS)   I want to disable the active physics when the car is far and/or not visible on camera. I tried to clear that bit, worked, but the car is teleported. If I understood correctly, whenever this bit is cleared (after enabled), the car is teleported to the next node (but not exactly, I think).