看一下幫助,裡面有 hOe$h,E']
INTERFACE r [ t m m'] ? (Li)@Cn%
COAT k coat coat' KA."[dVa
-k RohD.`D
+k D[(T--LLT
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. V6b)
+ 指只有折射沒有反射光, _2eL3xXha.
- 指只有反射沒有折射。