看一下幫助,裡面有 i03gX<=*
INTERFACE r [ t m m'] ? Ae49n4J
COAT k coat coat' Rd%0\ B
-k (Es{l a G
+k 4ht\&2&:
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. x=,8[W#XT
+ 指只有折射沒有反射光, 9":2"<'+
- 指只有反射沒有折射。