It is not a glitch, it is just rapidly changing the potion effect, which gives a diff FOV, so the FOV gets rapidly changed. It is not a glitch, it is just how the game works.
I'm not sure what you are referring to, but I was talking about the glitchy sprinting behaviors that sometimes occur in SMP.
That was only what he compared it to it was about giving a potion effect for 1 tick on a kind of a loop
FlareLine simgar98 So the glitch cannot be removed?? But when you use comman blocks to apply the potion in vanilla minecraft the screen dosent zoom in and out constantly so are you sure its minecraft thats the problem??
A little while ago, but I've updated the plugin, with a function you might like http://dev.bukkit.org/bukkit-plugins/blockeffect/ You now can use coord specifik blocks, and also clear the effects if they walk over a block! which could help you, just line the area with these blocks, if needed even do some air blocks above it?
I created something that could be found similar to suggestion (not at all, but...) some time ago. RoadProtector