This WAD contains textures not found in or different from the current release of Half-Life. Textures were obtained from the v0.52 build of Half-Life, the Half-Life: Day One demo from Half-Life Initial Encounter, and some custom-made textures which I may add to later on.
Will update this to add any new textures if any other early versions are publicly available or if I decide to continue with recreating missing textures.
Hope this proves to be useful for someone!
Updated to fix some errors and add new textures, such as the mythical "nipple" texture from Day One's xeno.wad file.