Those upscaled Sam&Max backgrounds looks perfect in my opinion... 😮
About the ScummVM and modding backgrounds... each engine has it's own trickery inside, so It would have to be added engine y engine, game by game... too much work Somewhere on the ScummVM forums I read something about they being more inclined to a realtime AI upscaler than to mod-packs... as with image pack you have to provide modified-copyrighted-material.... but hey, there are mod-packs for the music, doesn't it?
Anyway, although maybe, SCI games are far easier to mod, I was completely blown away by ScummVM-Ex project ... I would love this kind of treatment for more games, specially other engines.