User blog comment:Kogath/Monster Hunter 4 Ultimate for the Nintendo 3DS/@comment-26074976-20140510141927/@comment-5043481-20140510235431

The dark caves in tri looked nice, but they were annoying as hell. The torch system was good for this, but in tri ultimate torches became the most useless item in the game.

Strangely the series seems to be moving away from this. Unite had night and day, some areas had rain an night, so you could use lightning rods. And of corse the hot/cold temperatures of the desert. 3rd gen got rid of all of this. We don't even have rain now.