we have a server with a couple of friends, and i decided to make a nether hub. i covered it in glass, but magma cubes still seem to spawn. (the hub is in the basalt deltas biome) this might be happening in other biomes aswell but i didn't try that. and other than that ghast spawning is weird aswell. i left a 1 block gap between the glass and a background under it. i've seen a couple ghasts there, they might have just spawned under the hub and were going trough the blocks (i guess their model is larger than their hitbox) but ghast's spawning still seems a bit off, i sometimes find holes in the wall, like from a fireball. people told me they spawned inside a few times. (hub is like 10 blocks tall, i might just not know how much space ghasts need to spawn.)