Scroll down to Extended Texture Budget and adjust it as needed.,
NOTE
Doing this can drastically help with your textures loading in, this includes the map, other vehicles and players! Increase this to around 50% or whatever your Video Memory display at the top of the menu can generally handle.
WARNING
Do NOT push your texture budget to the point where your Video Memory turns red.
Even with a high-end GPU, avoid maxing it out—drop it 1–2 notches to prevent issues.