What it does
OneChunk will limit a player to only see one chunk at a time. The best way to understand this is to see a video.

It hides blocks:

(here's the link if Spigot is being funny)

And entities:

(here's the link if Spigot is being funny)

It does not lag the server (unless there are obscene amounts of entities).

NOTE: This does not modify the server in any way. If you toggle and up your render distance again, and you see missing chunks, do not panic. Simply relog and the chunks will revert to normal.

Getting started

Installing this plugin is just like installing any other plugin:

1. Download the jar
2. Locate the folder your server.jar is in
3. Find the plugins folder
4. Drag and drop the downloaded jar into your plugins folder and restart the server

Make sure you set your Render Distance to 2 Chunks for full effect.

(here's the link if Spigot is being funny)

Commands
There is only one command: /oc or /onechunk.

Usage:
/oc toggle - Toggle the effect for yourself
/oc toggle <player> - Toggle the effect for the given player

Support
If you need help, hop on my discord and I'll be glad to help you!