I have it kind of working so I can answers a few things now.
maps/random/rmbiome/generic/alpinenothing.json is what works.
Removing entries does not cause crash just causes biome system to return to default so no JS error.
"Gaia": {
"tree1": "gaia/fauna_tiger",
"tree2": "gaia/fauna_tiger",
"tree3": "gaia/fauna_tiger",
"tree4": "gaia/fauna_tiger",
"tree5": "gaia/fauna_tiger",
"fruitBush": "gaia/fauna_tiger",
"chicken": "gaia/fauna_tiger",
"mainHuntableAnimal": "gaia/fauna_tiger",
"fish": "gaia/fauna_tiger",
"secondaryHuntableAnimal": "gaia/fauna_tiger",
"stoneLarge": "gaia/fauna_tiger",
"stoneSmall": "gaia/fauna_tiger",
"metalLarge": "gaia/fauna_tiger",
"metalSmall": "gaia/fauna_tiger"
},
This generates a resource nothing map. Little bit overly hostile with tigers everywhere including walking on the sea floor. Also almost totally fatal if you start on low resources.
I think chicken will have to come some form of trade cart.
Yes replacing trees, stone, metal, bush, tigers do work. Wonder how many of the hostile gaia I can in fact get into 1 biome define.
Vary them still gives me what I am after.
I am guessing there will be worthless items I could use in other versions of nothing biomes.