看一下幫助,裡面有 7eh|5e$@
INTERFACE r [ t m m'] ? ifu"e_^
COAT k coat coat' F:/R'0
-k g~L1e5C]z
+k MwxfTH"wi
The signs in front of k can be used to instruct ASAP to either propagate only a reflected ray (-k: t=0) at that object or to propagate only a transmitted ray (+k: r=0) at that object. ;+-$=l3[a
+ 指只有折射沒有反射光, dt"[5;_P`
- 指只有反射沒有折射。