Board Thread:Bug Reports/@comment-25565811-20161215233736/@comment-26553378-20161216023050

SamwiseFilmore wrote: Well, I think the condition for troll hoard spawning is for there to be a block of stone underneath. This would be considered a bug. The programmer can claim to have fixed something and have it end up not being fixed. It's heard of.

could be switched to not "see the sky" (meaning there are no blocks above it) i believe