Well, this thread's about special patches, i.e.: Rustling Grass, Bird Shadow, bubbly water, dust clouds, etc.
Did you like this new feature? Why (not)?
What's your explanation to them, sure rustling grass is that critter moving but what about bubbly water? And dust clouds?
I personally can't answer as I've hardly ever found them, when I found it was like water tile before Surf.