Not Appearing New Textures...

[Dan7e]

Hi!

I ran into an unsolvable bug(?) in Call of Pripyat. I wanted to add a new inventory texture (to fill the large empty space on the right side), however ingame it showed me a black space, like the engine did cut out the place on the screen to show the texture, however it couldn't find the texture file itself.
I found out, the problem is in the config/ui/textures_desc/actor_menu.xml file. It seems it simply ignores the new textures id, that wasn't originally in the game. (I replaced it with an existing one, and it showed ingame flawlessly).
My querry is, is there a list of somekind that I have to add the new texture id to recognise it? (there was an ltx file in configs/ which listed all of the .dds textures in the textures folder, however wheather I used my new texture from a different file, or added it to an existing dds file, it didn't matter).
Can somebody answer me, what I'm missing?