看一下幫助,裡面有 3071:W
INTERFACE r [ t m m'] ? B0)]s<<
COAT k coat coat' 61K"(r~
-k Hs?zq
+k ?m"|QS!!K
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. 'Bq ZOZw
+ 指只有折射沒有反射光, wu~hqd
- 指只有反射沒有折射。