I think you misunderstood. The only time zombies would just spawn would be when you're digging, eg; you happen to dig a tunnel beside a block or position marked as a buried dead body. That's when it would spawn.
After you have dug the tunnel, the only time they would dig out would be during a blood moon based on your game stage. We wouldn't want them murdering everyone like crazy but for someone that's been a hermit for a while and gets a high gamestage, the game would start adjusting for their tactics by spawning blood moon hordes underground and having them dig out. If multiple players and one is above ground, split up the spawns for above and below ground.
This may even be regulated by a specific zombie type to keep things fair until very very high game stages. Eg; only spawning crawler types at first, then up it as the game stage goes up.
Since players in general don't want their worlds becoming swiss cheese but still want a threat when playing cave dweller this was what was thought up as a decent interim even if a bit gamey. Again just an idea, not set in stone for sure.
Hey Kin,
After some discussion I think I get it.
And its just a little too much, and it would annoy the crap out of some players, especially me.
Building underground takes a lot longer to dig out and organise if you want a decent base (depending on the resources that you use) since you need a functional bench and cement mixer to get the tools and blocks u need to get yourself carved out and concretized'
I am absolutely in agreement with The Dark Knight,there should be one last refuge that we can be safe in.
If everywhere you build is just going to be wrecked thats a turn off, honestly, for me as a player. And I know my friend doesnt like to fight blood moons though she is ok with wanderers, so she would quit.
Its ok for you guys since once a game is sold youve made your money, but its not good for the game losing players and giving bad rep.
Like I said I dont mind anything being added that conflicts with the players preferred playstyle, just so long as the feature has a toggle so those who dislike it can disable it.
That would be super amazing
Just like Spacepiggio said, its no ones business to tell others how to play, especially in pvp worlds, underground lets you survive players and zombies and thats what its about. Tactics and fun.
Edit: The natural underground hazards seemingly requiring mining suits and oxygen tanks for the initial dig - thats friggin amazing.
A great natural hazard to overcome before you can proceed with your bunker, thats more like it!
Edit 2: What about the spawning of an entity that would be more believable. Mutant rats, twice the size of the rabbit, those would add nice threats until your blocks were placed