看一下幫助,裡面有 mu\1hKq;B
INTERFACE r [ t m m'] ? aU6l>G`w
COAT k coat coat' ,b5'<3\
-k b+~_/;Y9
+k T<*)Cdid
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. xL15uWk-
+ 指只有折射沒有反射光, vEI{AmogRx
- 指只有反射沒有折射。