看一下幫助,裡面有 99w;Q 2k
INTERFACE r [ t m m'] ? .}n,
COAT k coat coat' xdb9oH
-k 2\h}6DGx2
+k mX3~rK>@~
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. M3c!SXx\
+ 指只有折射沒有反射光, F(c~D0
- 指只有反射沒有折射。