How much space is required for a ghast to spawn?

According to MinecraftWiki:

Ghasts are able to spawn anywhere in the Nether, as long as there is sufficient space.

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  • 2 Solutions collect form web for “How much space is required for a ghast to spawn?”

    Sufficient space for a ghast is a 5x5x5 cube.

    Source

    Notch: they should require 5*5*5 meters, but I haven’t double checked it. They might spawn in 4*4*4

    (Presumably in the time between Alpha 1.2 and the current version, Beta 1.6, Ghasts now definitely behave as originally intended)

    Ghasts do not spawn in the normal world, despite Notch’s earlier intentions.

    Source (jeb)

    I think here “sufficient space” means sufficient space for the Ghast itself. Since Ghasts are 4x4x4 Having rooms smaller than this or having strategically placed pillars should prevent their spawning.

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