Anti Pie

The server withholds certain hidden block entities from chunk packets before they reach the client, so a player using the debug pie chart cannot locate them through it. Hidden positions are checked on a schedule. Once a concealed block turns visible, the server transmits a single substitute chunk packet covering the affected chunk. Visibility is judged with a voxel raycast that counts full solid blocks as blockers, and transparent or partial blocks do not hide a target.

The config file anti-pie.json5 is created in the server's config folder on first start. It is written in JSON5, so comments are allowed and the file is easier to read and adjust. Settings include which block entities are hidden, how close a player must be before a hidden block entity is always shown, and how often visibility checks run, which balances server work against responsiveness. Positions that are hidden get kept as packed longs, which holds down memory consumption.

Anti Pie runs on Fabric and on the Paper, Spigot, Bukkit and Purpur server platforms. Players join without installing anything, since the mod is server-side only. The code is released under CC0 1.0 Universal and is open source. Files cover 32 release versions 1.18 – 26.3, with 1.2.0+26.3 as the latest Fabric file.