Not much to say, it’s a cave. It’s a lot sharper and more detailed than the original one given to us by Enterbrain in the VX RTP. That’s not always a good thing though!

Detail draws in eye attention, and you generally don’t want that on your tiled backgrounds. There are many people who dislike TheInquisitor’s popular tilesets (which he created for Rpg Maker XP) for that reason. One trick is not to use solid blacks for your shadows & detail lines.