Forgotten Nature 群系包
RTG 为 Forgotten Nature 提供的群系包，共 9 个群系。
每个群系由一对类定义：BiomeConfig<Pack><Name>（配置面，落在 config/RTG/biomes/<pack>.cfg，见 群系配置属性）与
RealisticBiome<Prefix><Name>（生成面，落在 world/biome/realistic/<pack>/）。
| 项目 | 值 |
|---|---|
| 群系数 | 9 |
| 配置前缀 | forgottennature |
| 宿主 modid | ForgottenNature（Loader.isModLoaded 实测值） |
| 配置键格式 | <prefix>.<slug> |
| 配置类 | rtg.api.biome.forgottennature.config.BiomeConfigFN（静态字段 holder，提供 getBiomeConfigs()）+ BiomeConfigFNBase（基类，携带 modSlug） |
群系一览（9）
「基础群系」是 RTG 复用的宿主 mod 原有 BiomeGenBase——RTG 自身不申请新的生物群系 ID，
只是接管该群系的地形、地表与装饰生成。数值全部逐类读自源码。
| 群系 | 配置键 | 基础群系（BiomeGenBase） |
地形类 | 地表类 | 装饰数 |
|---|---|---|---|---|---|
cherryblossomwoodland |
forgottennature.cherryblossomwoodland |
Cherry Blossom Woodland |
TerrainFNCherryBlossomWoodland |
SurfaceFNCherryBlossomWoodland |
1 |
crystalforest |
forgottennature.crystalforest |
Crystal Forest |
TerrainFNCrystalForest |
SurfaceFNCrystalForest |
1 |
eucalyptusforest |
forgottennature.eucalyptusforest |
Eucalyptus Forest |
TerrainFNEucalyptusForest |
SurfaceFNEucalyptusForest |
1 |
greatwoodforest |
forgottennature.greatwoodforest |
Greatwood Forest |
TerrainFNGreatwoodForest |
SurfaceFNGreatwoodForest |
1 |
mapleforest |
forgottennature.mapleforest |
Maple Forest |
TerrainFNMapleForest |
SurfaceFNMapleForest |
1 |
redwoodforest |
forgottennature.redwoodforest |
Redwood Forest |
TerrainFNRedwoodForest |
SurfaceFNRedwoodForest |
1 |
redwoodforesthills |
forgottennature.redwoodforesthills |
Redwood Forest Hills |
TerrainFNRedwoodForestHills |
SurfaceFNRedwoodForestHills |
1 |
tropicalforest |
forgottennature.tropicalforest |
Tropical Forest |
TerrainFNTropicalForest |
SurfaceFNTropicalForest |
1 |
tropicalforesthills |
forgottennature.tropicalforesthills |
Tropical Forest Hills |
TerrainFNTropicalForestHills |
SurfaceFNTropicalForestHills |
1 |