看一下幫助,裡面有 !"eIV@7
INTERFACE r [ t m m'] ? hGiz)v~
COAT k coat coat' `F/Tv 5@L
-k A'2w>8
+k 6P';DB
The signs in front of k can be used to instruct ASAP to either propagate only a reflected ray (-k: t=0) at that object or to propagate only a transmitted ray (+k: r=0) at that object. }fKSqB]T-
+ 指只有折射沒有反射光, C:Hoq(
- 指只有反射沒有折射。