Void Spawn Fix

On floating island worlds such as Skybound, terrain generation could place mobs directly under an island, where they would spawn and fall into the void almost at once. The mod stops those spawns, so mobs appear only on ground where they can stand. Wasted spawn attempts on empty air are cut, which the author says leaves mob spawning cleaner and more efficient. The mod was originally made to work alongside Create Aeronautics. It runs on the server alone, so players join without installing anything. Files are published for NeoForge only, for 1.21 and 1.21.1, with 1.2.0 for 1.21.1 as the latest build.