看一下幫助,裡面有 F.ryeOJ
INTERFACE r [ t m m'] ? 5WgdgDb@L
COAT k coat coat' ]R\k@a|G
-k qyGVyi3
+k e4u$+
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. q3JoU/Sf
+ 指只有折射沒有反射光, 1uz9zhG><
- 指只有反射沒有折射。