Zandronum

la-pack 3 part 2: has maps but a lot of textures missing.
la-archinvasion: no maps.
la-newstuff: no maps.
la-blancaradiov: no maps.

I guess the last three are addons for skins, music etc but no idea what textures I need for the first one. EDIT: tried both parts of the la-pack but still missing textures.

I remember having problems launching original [LA]worlds wads in Zandronum myself. Textures were flickering and such. I don't remember what the issue was and what is the cure. But I certainly do remember I had to edit the wads myself, meaning there is no "overlay wad" way to fix it. Just found it, here is [LA]SpaceStation6 for Zand for example. I think I sinmply removed TEXTURE1 and PNAMES lumps.
Since this is about [LA], you can check this [LA] wad that create maps on the fly ingame. Euroboros hosts a server with it in Zandronum.