看一下幫助,裡面有 _9"%;:t
INTERFACE r [ t m m'] ? N(L?F):fT
COAT k coat coat' X##hSGQM
-k A \~tr
+k _w49@9?
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. %8T"h
+ 指只有折射沒有反射光, G^_fbrZjN
- 指只有反射沒有折射。