We've begun the slow roll out of server side player occlusion culling on Facepunch servers. Mentioned in dev blogs, this anticheat feature hides the player from the network data if the player cannot be seen. There are some limitations in that this is only applied to terrain currently. We've tested and are currently running this feature on servers with holding 350 population simultaneously. This greatly limits the use of cheat features such as ESP and other radar like features.