看一下幫助,裡面有 $C.a@gm
INTERFACE r [ t m m'] ? f"RC(("6W
COAT k coat coat' ( +Sv3h
-k ?z`={oN
+k ynv{
rMl
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. )X-'Q -
+ 指只有折射沒有反射光, ,A'| Z
- 指只有反射沒有折射。