There is nothing wrong with crosses. To the best of my knowledge crosses are not banned anywhere normal.
But:
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We never intended there to be any crosses in the first place. I originally asked for a “spooky grave yard” biome not a christian graveyard. But once it was instanced into the world we decided that it wasn’t a big problem and would simply remove it from the biome for the future worlds rather than taking the world offline.
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Boundless is a universe of unexplained science + technology, and not magic + mysticism. It simply doesn’t need references to human believe systems, so they should be avoided.