reflection is not right

mga sir question lang po bakit po kaya yung reflection ko dun sa window glass ay kulay gray or white ang column...
ano po kaya mali ko doon ? thanks po
ito po yung render sketchup & vray only..

actually not only the reflection i mistake,give you an imho...the environment set up is not consistent with the use of active artificial light...see, your background appears still have a sunligh which is not accurate for the use of artificial light on exterior,instead put artificial light inside the structure could somehow make your scene a bit real. just an imho..for the reflection...try to modify the material setting for the glass...

reverse face mo yung window then apply materials uli...linis ng render mo..i photoshop mo gaganda pa yan...save mo as png para malagyan mo ng bagong background...