>>12024481
I actually posted these >>12022781 hoping to bait that reply lol
They are actually not traditional painted in any capacity. The artist is Iain McCaig (pretty well know among pros); he talked about this early gig fairly recently in an interview for a LucasArts fan website. He "painted" all these from scratch using digital software and a MOUSE since tablets weren't a thing back then, and not even referencing photographs (though he used his coworkers as inspiration).
To be fair though it's not really "pixel art" but rather a very early and inconvenient form of digital painting.