看一下幫助,裡面有 ~w%+y
INTERFACE r [ t m m'] ? F>nrV
COAT k coat coat' t$Ji{t-
-k ZjID<5#
+k PhL5EYn
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. ;^SgV
+ 指只有折射沒有反射光, J*k=|+[
- 指只有反射沒有折射。