The mod alters the particle system parameters (located in the TFC and INI files). Instead of 200 visible rain streaks, the mod spawns thousands of semi-transparent, physics-aware droplets. This creates a "wall of water" effect when you grapple to a gargoyle.
Because there isn't a single "click-to-install" rain toggle for the base game, players usually achieve this look through a combination of texture packs and visual overhaul mods. 1. Asylum Reborn (The All-In-One Solution) batman arkham asylum rain mod
You will see a file named Rain_Physical.upk . Overwrite the existing package. (Make a backup of the original first). The mod alters the particle system parameters (located