WorldEditでbiomeを変えることができる。
Biome Commands
1. 利用可能なbiomeを見る：getting all biomes available
/biomelist
2. biomeが何かを知る：getting the biome of the targeted block
/biomeinfo [-pt]
-p: 今いるblock: the block you are currently in
-t: 見ているblock: the block you are looking at
3. biomeをセットする: set the biome
//setbiome [-p] <target>
<target>: biome you want to set
[-p]: use your current position
