Usage | 用途

Fix Distracting Normal | 修复杂乱的法线

如果使用树叶幾何体自带的法线，往往会产生杂乱无章的结果，导致树叶显示非常醜陋。SpeedTree 自带有球形法线的功能，可以将这些法线进行平滑。

The normals coming with the leaf geometry often results in a messy and disorganized appearance, causing the leaves to look very ugly. SpeedTree comes with a spherical normal feature that can smooth these normals.

但是，SpeedTree 自带的球形法线会使得不同叶簇之间的细节、层次被抹平，且与原本幾何体的形态相差太远，导致许多的着色问题。

However, the spherical normals of SpeedTree tend to flatten out the details and levels between different leaf clusters, and they are too far from the original geometry's shape, leading to many coloring issues.

Geometry Normal | 幾何体原本的法线

SpeedTree Spherical Normal | SpeedTree 自带的球形法线

Clustered Smooth Normal | 分簇平滑法线

Fix Improper Shading | 修复不合理的着色

Blotchy or Flat Direct Lighting | 「斑块状」的或过平的直接光照

SpeedTree Spherical Normal. The lighting may be too flat, makes the shading just like a gradient.
SpeedTree 自带球形法线。光照过于平滑，着色甚至像一个单纯的渐变色。

SpeedTree Spherical Normal. The lighting may be too flat, makes the shading just like a gradient. SpeedTree 自带球形法线。光照过于平滑，着色甚至像一个单纯的渐变色。

Clustered Smooth Normal. The lighting tells the hierarchy of leaves more clearly.
分簇平滑的法线，光照能够把树叶的层级结构勾勒得更清晰。

Clustered Smooth Normal. The lighting tells the hierarchy of leaves more clearly. 分簇平滑的法线，光照能够把树叶的层级结构勾勒得更清晰。

SpeedTree Spherical Normal. The lighting makes the leaves blotchy. Some patches are plain dark and some others are plain bright.
SpeedTree 自带的球形法线，光照使得叶片看起来呈斑块状，一块平坦的暗部紧接着一块平坦的亮部。

SpeedTree Spherical Normal. The lighting makes the leaves blotchy. Some patches are plain dark and some others are plain bright. SpeedTree 自带的球形法线，光照使得叶片看起来呈斑块状，一块平坦的暗部紧接着一块平坦的亮部。

Clustered Smooth Normal. The patches are eliminated.
分簇平滑的法线，不再有明显斑块感。

Clustered Smooth Normal. The patches are eliminated. 分簇平滑的法线，不再有明显斑块感。

Too Much Backside Specular | 过多的背光反光

SpeedTree Spherical Normal

Clustered Smooth Normal

Lack of Transmission | 缺少透光

SpeedTree Spherical Normal