Luminous is one insane beast. I've not seen an engine that manages to push all of those aspects so hard. The lighting is insane, texturing on characters is crazy, phenomenal draw distance, weather effects that I've rarely even seen attempted to this level, crazy partial effects. Such a shame the guy making it left before it was fully completed but it looks like SE are doing a damn good job of finishing it up anyway.
It's not Agni's Philosophy level clearly but I also didn't expect it to get this close either.