看一下幫助,裡面有 q~aj"GD
INTERFACE r [ t m m'] ? fATVAv
COAT k coat coat' F~rl24F
-k aLW3Ub{h
+k f &NX~(
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. YGQ/zB^Pj
+ 指只有折射沒有反射光, b1'849i'y=
- 指只有反射沒有折射。