参考
雕刻模式
Toolbar ‣ Scrape
The Scrape brush works like the Flatten brush, but only brings vertices above the plane downwards.
Ratio between the brush radius and the radius that is going to be used to sample the area center.
使用手写笔的压力来控制效果的强度。压力的梯度可以使用 曲线小部件 来定制。
启用后,在雕刻时按住 Ctrl 会将笔刷行为更改为与 填充 笔刷相同。禁用时,在雕刻时按住 Ctrl 将光标上方的顶点向上推离光标。