看一下幫助,裡面有 1
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INTERFACE r [ t m m'] ? MS%h`Ypo
COAT k coat coat' f6HDfJmE
-k FCYZ9L5uF
+k FkoN+\d
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. jCt[I5"+z
+ 指只有折射沒有反射光, h"Q&E'0d
- 指只有反射沒有折射。