Wow, you seem uniquely drawn to weird generator settings, I'm especially curious how you managed to generate the screenshot in post #8, can you post your world.ini?
For a Nether world, you need to set world.ini properly. Best to delete the entire [Generator] section and replace it with contents below; the server will auto-fill the missing values.
We really need to update the wiki on world.ini, the nether settings are missing altogether.
Of course, once you set this world.ini, it's best to delete all the mcr files so that the entire world is regenerated; otherwise you'll have leftovers from the already-generated world. That's probably what happened in post #6's screenshot.
For a Nether world, you need to set world.ini properly. Best to delete the entire [Generator] section and replace it with contents below; the server will auto-fill the missing values.
Code:
[Generator]
BiomeGen=Constant
ConstantBiome=Nether
HeightGen=Flat
FlatHeight=128
CompositionGen=Nether
Structures=WormNestCaves
Finishers=BottomLava, LavaSprings
BottomLavaHeight=30
# This sets the proper lighting mode on the client
[General]
Dimension=-1We really need to update the wiki on world.ini, the nether settings are missing altogether.
Of course, once you set this world.ini, it's best to delete all the mcr files so that the entire world is regenerated; otherwise you'll have leftovers from the already-generated world. That's probably what happened in post #6's screenshot.