看一下幫助,裡面有 fbzKO^Ub
INTERFACE r [ t m m'] ? bD-/ZZz
COAT k coat coat' $_URXI
-k >XXMIz:
+k k8x&aH
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. U Qi^udGFD
+ 指只有折射沒有反射光, MWn L#!
- 指只有反射沒有折射。