Raycasted Entity Occlusions

This is an async plugin for PaperMC and its forks that hides/culls entities (and tile entities) from players if they do not have line-of-sight.

The supported versions are 1.21.x PaperMC and Pufferfish. Other server versions and software may work too.

Use cases:

• Prevent cheating (anti-esp hacks)
  • Block usage of pie-ray to locate underground bases
  • Prevent mods such as mini-maps or cheat clients from displaying the locations of hidden entities
• Increase client-side performance for low-end devices
  • Massive megabases containing hundreds of armour stands, item frames, banners etc can cause performance issues on low-end devices unable to process so many entities. REO will cull those entities for the client, reducing the number of entities to process.
• Hide nametags behind walls
  • Yes, this plugin is a bit overkill for doing that, yes you can do it anyways.

Known issues:

• Due to the nature of the plugin, there will be a short delay once an entity should be visible before it appears, causing it to appear like it "popped" into view. This issue is partially resolved by turning engine-mode to 2