看一下幫助,裡面有 `dv}a-Q)c
INTERFACE r [ t m m'] ? wC(vr.,F
COAT k coat coat' pHen>BA[
-k $hjP}- oUX
+k h"%|\o+3
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. VqK%^
+ 指只有折射沒有反射光, 0%xR<<gir
- 指只有反射沒有折射。