flicexyzantixray(free)
Hides blocks from Y ≤ 16 if the player is ≥ 31.0; very useful against freecam hacks (for real xray prevention you should check out raytraceantixray and use it alongside this)

REQUIRES packetevents 2.8.0

permission:

• ylevelhider.admin: /ylevelhiderworld, /ylevelhiderreload
• ylevelhider.debug: /ylevelhiderdebug

known issues: some chunks (around 4-8) might not be visible to the player when they're constantly moving up and down while also loading new map sections. This bug can be temporarily resolved by doing basically anything that revolves around refreshing chunks (think of /home, /tp, moving up and down, rejoining...) Any PR that fixes this issue will be greatly appreciated.