看一下幫助,裡面有 DY,Sfh;tp
INTERFACE r [ t m m'] ? =.tsz.:c
COAT k coat coat' zW+Y{^hf
-k ]c$%;!ZE
+k Sgr<z d'b
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. #<se0CJB
+ 指只有折射沒有反射光, 7b
Gzun&
- 指只有反射沒有折射。