看一下幫助,裡面有 Kk,->q<1
INTERFACE r [ t m m'] ? }yw\+fc
COAT k coat coat' p#&6Ed*V
-k 8WH>
+k (Cq-8**dY
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. ^ey\ c1K
+ 指只有折射沒有反射光, )sQbDA|p
- 指只有反射沒有折射。