看一下幫助,裡面有 0JR/V68$
INTERFACE r [ t m m'] ? <J%qzt}
COAT k coat coat' UG1<Xfu|
-k aRd~T6I
+k bC&A@.g{
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. b[%@3 }E
+ 指只有折射沒有反射光, [i.@q}c~E
- 指只有反射沒有折射。