看一下幫助,裡面有 Tpp &
INTERFACE r [ t m m'] ? a~LC+8|JW
COAT k coat coat' i8X`HbmN
-k ~ A Qp|
+k &NZfJs
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. ;$j7H&UNQj
+ 指只有折射沒有反射光, vEe NW
- 指只有反射沒有折射。