看一下幫助,裡面有 #K~j9DuR
INTERFACE r [ t m m'] ? >Ki]8&
COAT k coat coat' 3'NL1d u
-k +!Gr`&w*)
+k 5WNRo[`7
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. 2\8\D^
+ 指只有折射沒有反射光, jm!C^5!
- 指只有反射沒有折射。