i have the cs:s content and maps and the half life 2: episode 2 content/maps. i got all of these as folders in my addon folder. the css content stuff always worked for me but when launching elevator source i noticed that tons of textures and models are still missing for me. is there some content that is just unobtainable without actually owning episode 2?

(note that i own the original hl 1 and 2, just not any of the dlc)