Kinda hard to explain, but XP came with the ability to add "fog/cloud" effects over maps, and determine their movement. MZ's DLC, I believe, comes with several "fog" effects, like sandstorm, sunrays, cloud shadows, etc. However, not sure how one is supposed to implement these into the maps, and how they would fit across the entirety of the screen, or move across the screen, if using it as a "Show Picture" effect.