Y-Level Based Anti-Xray - Something to consider if SMP is reset

It was mentioned that down-sizing the world size if SMP reset might be considered, but that pie-ray would have to be addressed. This is one possible option to nerf pieray. This is how DonutSMP handles it (not a server I actively play, but a server that I tried out of curiosity around a year ago). I can potentially provide more specific details if desired. (keep in mind I might be missing some details, this is just the idea) If the player is above a certain "threshold" Y height, then blocks (and possibly entities) below Y=0 are not sent to the client. If you go below the "threshold" height, then these blocks ARE sent to the client. If you go above the threshold height, if I remember correctly they stop being sent to the client and "disappear" again. From what I remember there may be some visual artifacts (i.e. if you have a base that extends from bedrock to ground level for example) which is one downside to keep in mind. This means that when walking around the surface (or flying with elytra), bases below this height are impossible to find using xray or pieray. Only if you dig down/are in a cave can you find the base with xray/pieray. Players ideally would be aware of this (that they need to build their base below y=0 for it to be secure). It's also worth noting that pieray is not OG (it didn't exist in 1.8.9, although other F3 tricks could be used to find entities). It is debatable if this would make it too easy to hide bases though. (I think there's some more obscure methods to find bases, but not as knowledgeable on this) READ COMMENTS