看一下幫助,裡面有 e@0|fB%2
INTERFACE r [ t m m'] ? (@xC-*
COAT k coat coat' F1- "yX1B
-k R8u8jG(4
+k ;nW;M 4{
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. Tgtym"=xd
+ 指只有折射沒有反射光, _BerHoQd
- 指只有反射沒有折射。