/vr/ - Retro Games

help me out guys
I am using Ultimate Doom and Doom2 Iwad, they work fine in editor, and when I make a testrun in editor textures display correctly, however when I run it through GZdoom on its own, it will drop textures from Iwad that is not loaded

it can be countered by selecting both my wad, ultimate doom iwad, dropping them onto gzdoom exe and then selecting doom2 iwad from the list as the one you want to play

question is if this is acceptable, or should I rip textures from UD iwad into my own wad?
if I have to rip them, whats the least painful way of doing it?