看一下幫助,裡面有 u"%D;
INTERFACE r [ t m m'] ? |Kjfh};-C
COAT k coat coat' EkRx/
-k K7.ayM 0
+k %Tu(>vnuj
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. hO{&bY0
+ 指只有折射沒有反射光, 0VNpd~G$
- 指只有反射沒有折射。