how to use the function, ReflectionVectorWS
who can help me to explain how to use the function, ReflectionVectorWS. Although I have make several tests in the material editor and observed change of the material ball, but till now, I don;t undertand about it.
In addition, the docs tell "The ReflectionVectorWS expression is similar in spirit to CameraVectorWS , but it outputs a three-channel vector value representing the camera direction reflected across the surface normal. ".
So ," the camera direction reflected across the surface normal.", what means ?
asked Oct 20 '17 at 04:33 PM in Using UE4
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