It's totally worth it to put in the extra effort for these things I think. It's never necessary for sure, a simple painting would be easier, but the hard work certainly is noticed and appreciated if you do it. Even the people that will fly through games and not pay much attention to the art itself, will at least have that subconscious awareness that the world feels slightly more alive and full, and that it has more depth.The simple paintings work great as backgrounds, but they do leave a harmless lingering feeling that they're just backgrounds, nothing more. Things like this feel like the glimpses of world behind the character, rather than merely a background.I reckon so anyway