使用高光贴图你不可以让任何表面都象镜子，但你能改变亮度和颜色，当我们放置一个灯光在上面时。

You can't make anything act like a mirror with specular maps, but you can alter the brightness and the colour you will see when you place a light above it.

youdao

当光纤长度较短时，在输出端放置反射镜使泵浦光高反射，可以提高输出功率和效率。

For short fiber, the output laser power and slope efficiency can be improved when a reflective mirror is set at output end to reflect the pump light.

youdao