看一下幫助,裡面有 06$!R/K
INTERFACE r [ t m m'] ? lY|Jr{+Ln
COAT k coat coat' dJT]/g
-k nF6q7
+k ^Wxad?@
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. Ee`1F#c
+ 指只有折射沒有反射光, ^Ge+~o?x
- 指只有反射沒有折射。