Flyboy85 wrote on Mar 3^rd, 2019 at 9:47pm:

What exactly did you copy?

You can either copy the texture.cfg from the texture.CS.2018 folder (of the 757 model you have the problem with the missing textures i.e. the CS_B757-300-III_RB535E4B\texture.CS.2018 folder for the 757-300RR\texture.cfg), and paste it in the texture.xxx folder of the livery you are having the trouble with, overwriting the blank texture.cfg.

Or. Using the same folder locations as the previous paragraph, open the texture.cfg in the texture.CS.2018 folder, copy all the contents within it, then open the blank texture.cfg, and paste the contents you just copied into it, then save.

Both of these methods should at least fix the missing/damaged textures, but does not solve the reason for why the ACE isn't filling the texture.cfg correctly when adding a livery.