Thanks, n00854180t! That of course changes a lot. Still I wouldn’t pick too high numbers for your dungeon as 10,000 tiles need about 1 to 2 minutes to be spawned … unless you want to wait more than 10 minutes.
10,000 tiles fill the whole screen by the way, even beyond the Far Z plane. But thanks to the engine’s culling system, there is no noticeable FPS loss.