看一下幫助,裡面有 $iM=4
3W
INTERFACE r [ t m m'] ? C#w]4 $/
COAT k coat coat' GPWr>B.{:S
-k $A}QY5`+~S
+k ap}5ElMR
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. D^Ys)- d
+ 指只有折射沒有反射光, F8+e,x
- 指只有反射沒有折射。