看一下幫助,裡面有 A+3=OBpkW0
INTERFACE r [ t m m'] ? h 'is#X 6:
COAT k coat coat' vha@YPC=
-k |txzIc.#
+k \nQEvcH
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. )9!ZkZbv_m
+ 指只有折射沒有反射光, *I9G"R8
- 指只有反射沒有折射。