See Yourself In First Person (R6/R15) - Roblox (Local Transparency)
Invisibility tied to an "equippable" item. When the tool is equipped, the script triggers; when unequipped, transparency returns to 0. R15 Invisibility Script
Some scripts come with a Graphical User Interface (GUI) that allows users to toggle invisibility and speed boosts with a single click or hotkey (like pressing 'X'). See Yourself In First Person (R6/R15) - Roblox
A standard invisibility script functions by iterating through the character's children. On the , developers often share logic similar to this: the script triggers