I've been trying at this for a few hours now and I just can't seem to get this to work. What I am trying to do is create a FallingBlock entity that does not fall but instead will maintain a constant altitude. I have created a very crude custom entity for this (that overwrites the h() method in the class net.minecraft.server.v1_7_R3.EntityFallingBlock) to lock the Y level but it only spawns for one tick before it stops rendering (yet continues to exist on the server side). I have viewed three separate tutorials on custom entities to see if I am missing something simple but it does not seem that I have (granted that the tutorials were about custom entities in general, not floating blocks). If anyone could give me a hand with this I would really appreciate it.