看一下幫助,裡面有 _cd=PZhI
INTERFACE r [ t m m'] ? *yN#q>1
COAT k coat coat' lSBu,UQP
-k |] ]Rp
+k 2E@g#:3
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. ;;mr?'R
+ 指只有折射沒有反射光, bH.f4-.u>)
- 指只有反射沒有折射。