Can't see the screenshots in the Shadow Warrior Development Update links (the space where they should appear is empty, they don't seem to load), but look at the curious screenhot on this copy of preview from an ancient Game Bytes magazine (the magazine itself was in form of a program circulating on BBCs and FTPs back then) from 1994
(!) -
Link.
Seems it was first intended to be an Apogee game, before 3D Realms became independant. Also the graphics look very alike to that of
Legend of the Seven Paladins (probably using the same early version of Build engine).
Edit: I see you already included that screenshot, together with some others none less interesting of the same version in the compilation of screenshots. Oh well.