看一下幫助,裡面有 G[!Y6c3
INTERFACE r [ t m m'] ? Zp*0%x!e
COAT k coat coat' ]R s
-k 0'.7dzz
+k / qo`vk A
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. 2zN%Z!a#J
+ 指只有折射沒有反射光, Um\_G@
- 指只有反射沒有折射。