AntiBase

AntiBase is a lightweight obfuscation plugin for Paper servers designed to hide underground bases and caves from X-ray and Freecam. Unlike simple proximity systems, it uses a 3D flood-fill algorithm to determine what a player can actually see based on physical connectivity.

How it works

AntiBase intercepts outgoing packets to hide underground structures and players:

• Visibility Scanning: Uses a 3D flood-fill algorithm to find reachable air blocks.
• Occlusion: Buried blocks are replaced with a configurable block (e.g., Stone or Air) in real-time.
• Entity Hiding: Players and mobs in hidden areas are removed from the world tracker.

Features

• Flood-Fill Engine: Precise occlusion that respects walls and 1-block gaps.
• Player Hiding: Prevents ESP and wall-hacks while keeping players in the TAB list.
• Dynamic Radius: Scans up to 160 blocks around the player.
• Packet-Level: No modifications to world files or block data on disk.
• Debug Mode: Toggle visible sections via /antibase debug.

Installation

1. Drop AntiBase.jar into your plugins folder.
2. Restart the server.
3. Configure hide-below-y in the config.yml (default is 0).

Configuration

enabled: true
hide-below-y: 0           # Obfuscation starts below this Y level
proximity-distance: 16    # Safety buffer for block updates
replacement-block: STONE  # Block to show instead of air/ores

Permissions

• antibase.debug: Allows use of the debug toggle command.

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Requires Paper 1.21.x and PacketEvents.