看一下幫助,裡面有 ,rx?Ig}kz
INTERFACE r [ t m m'] ? 9E~=/Q=
COAT k coat coat' >xb}AY;
-k 42kr&UY&
+k //S/pCqED
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. c L}}^
+ 指只有折射沒有反射光, 8%q:lI
- 指只有反射沒有折射。