看一下幫助,裡面有 j"E_nV:Qc
INTERFACE r [ t m m'] ? 5M~\'\;
COAT k coat coat' AO9F.A<T5
-k C,w$)x5kls
+k `n7z+
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. M[0@3"}}
+ 指只有折射沒有反射光, aT#R#7<Eg
- 指只有反射沒有折射。