Block Outline FX is a client-side Fabric mod for Minecraft 1.21.4 that upgrades the vanilla block outline with fully configurable visuals.

Main Features

• Custom outline color (RGB + alpha)
• Through-walls outline mode
• Visual effects: rainbow, pulse, sparkle
• In-game vanilla-style settings screen
• Mod Menu config integration
• Hotkeys for quick access (O) and enable/disable (K)

Compatibility

• Minecraft: 1.21.4
• Loader: Fabric
• Environment: Client-side only

Author

• aizero_o