看一下幫助,裡面有 [B^ G-
INTERFACE r [ t m m'] ? 5PZN^\^
COAT k coat coat' x*}bo))hb
-k lKKERO5+
+k |}[nH>
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. EO)%UrWnC
+ 指只有折射沒有反射光, "Xn%at4
- 指只有反射沒有折射。