That’s not unreleased version and you know it. It’s from the Force Commander game.
Yes Force Commander it was in development when the Special edition was being made / developed hence the art direction on that and other stuff in the game.
I’m fond of matte paintings in film and personally I think it’s a bit better with the path up to the hut.
Also bear in mind most people could only run a game in 800 × 600 resolution back in those days as today we can see that image in HD and it might just scale to DVD quality or perhaps AI upscale?