My custom liveries have texture loss at some distance (not the car)

I've made custom liveries for my ford taurus (from tactical donnuts LAPD addon) since there is only one variation in his pack.

But as you can see, at some distance, it's all black.

The thing is that, using open IV, there is two type of texture name "sign";

- tau_sign_1 (is the texture of the car (black and white))

- tau_sign_1_ref (is the livery, numbers, flag, etc..)

But when I added "tau_sign_1_ref2", "tau_sign_1_ref3", etc. It didn't work, only the original one (tau_sign_1_ref) remains, so I tried to edit "tau_sign_1" with my custom liveries, (naming them "tau_sign_2", etc.) It worked, exept that now it have texture loss at some distance.

Is there anything to edit to fix it, or more likely, make working the custom "tau_sign_1_refX" ?