| terrain | 引用更改后的 TerrainData 资源的地形对象。 |
| heightRegion | 发生更改的高度贴图区域（以样本表示）。 |
| synched | 指示更改是否已完全同步回 CPU 内存。 |
将此委托类型与 heightChange 结合使用来监视对地形高度贴图的所有更改。
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