看一下幫助,裡面有 Y07ZB'K
INTERFACE r [ t m m'] ? pUV/Ul]
COAT k coat coat' 4*Hgv:0?kI
-k ^h"`}[+
+k -UOj>{-
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. p(/dBt[3k
+ 指只有折射沒有反射光, Vnr[}<L
- 指只有反射沒有折射。