Creating a skyworld
This page will explain how to make a Skylands world. CustomHeightControl is used to remove most of the ground. A number of other features also has to be disabled, like the bedrock and the underground mineshafts.
For simplicity, we are going to remove all biomes except Plains. Later we will bring some of them back. Open the WorldConfig.ini file. Set LandRarity to 100 to get rid of the Oceans and set IceRarity to 1 to get rid of the ice. Remove all IsleBiomes and remove all BorderBiomes. Remove also all NormalBiomes except Plains. Set RiversEnabled to false. Test the world to make sure that you have a world with only Plains. (Don't forget to delete the previous world region files every time you make changes to the config files!)
Now we are going to remove most of the ground. Set (still in WorldConfig.ini) DisableBedrock to true to remove the bedrock layers. Set WaterLevelMax to 0 to get rid of the water. (The small lakes in the resources queue from the PlainsBiomeConfig.ini still generate. Feel free to remove them.) Disable the strongholds and mineshafts using StrongholdsEnabled:false and MineshaftsEnabled:false, otherwise we would get strange floating stuctures.
Go to the PlainsBiomeConfig.ini and set CustomHeightControl to -2500.0,-2500.0,-2500.0,-2500.0,-2500.0,-2500.0,-2500.0,-1500.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0. This removes all blocks below y=64. Now we have a floating plains biome.
I also made the biome a bit more hilly by setting Volatility1 to 1.0, VolatilityWeight1 to 1.0 and
VolatilityWeight2 to 0.0.
Now we are going to bring the Forest biome back. Of course, you could also use another biome. Add Forest to the NormalBiomes in WorldConfig.ini. Set CustomHeightControl to -2500.0,-2500.0,-2500.0,-2500.0,-2500.0,-2500.0,-2500.0,-1500.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0 in ForestBiomeConfig.ini, just like you did with the plains biome. I also made the Forest biome have mountains using BiomeVolatility:0.5. You could add any other biome that you want, but remember to set CustomHeightControl to -2500.0,-2500.0,-2500.0,-2500.0,-2500.0,-2500.0,-2500.0,-1500.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0.
If you have any problems, you can download the result.
