手册:Minecraft:tree feature/常规树冠语法

"canopy": {
  "canopy_offset": {
    "min": <par1>,
    "max": <par2>
  },
  "min_width": <par3>,
  "canopy_slope": {
    "rise": <par4>,
    "run": <par5>
  },
  "variation_chance": <par6>,
  "leaf_block": <par7>,
  "canopy_decoration": {
    "decoration_chance": <par8>,
    "decoration_block": <par9>,
    "num_steps": <par10>,
    "step_direction": "<par11>"
  }
}