看一下幫助,裡面有 w8AJ#9W
INTERFACE r [ t m m'] ? MuDFdbtR
COAT k coat coat' >:w?qEaE
-k /#-,R,Q
+k ~pHJ0g:t
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. [n!$D(|"!V
+ 指只有折射沒有反射光, 8fJR{jD(s
- 指只有反射沒有折射。