看一下幫助,裡面有 ZU.)K>'
INTERFACE r [ t m m'] ? !-RpRRR[Co
COAT k coat coat' O4PdN?
-k DVoV:pk
+k `/JR}g{O
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. ;9 &1JX
+ 指只有折射沒有反射光, 06@0r
- 指只有反射沒有折射。