像往常一样，水泥地面色调有一点亮，但是不是很亮，又叠加了一层遮罩来避免重复，使其看上去更真实。

Concrete floor, as usual, slightly brilliant but not too much, plus a mask to avoid repetitions and make it look more real.

youdao

剔除遮罩使用层有选择地渲染一组对象。有关使用层的信息可以在这里找到。

The Culling Mask is used for selectively rendering groups of objects using layers. More information on using layers can be found here.

youdao

这样当覆材质的时候我就可以使用相同的遮罩使树皮的内外两层呈现不同的材质。

Then, when texturing, I can use the same mask to have different materials for inner and outer layers of the bark.

youdao