看一下幫助,裡面有 S^1ZsD.
INTERFACE r [ t m m'] ? Jl\U~i
COAT k coat coat' Md9y:)P@Y
-k +bso4 }rS
+k j7Zv"Vq@
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. BQ,749^S
+ 指只有折射沒有反射光, uCt?(E>
- 指只有反射沒有折射。