I am still a newbie in Maya, mayb its not in my place but I think your picture looks great. I do agree that some translucency would of made the image more believable , ... and the shine form outside is serious ,... So I think the outside should of dimmed or the room should of been brighter.
Dont take my word as gospel. Great piece, and welcome . I believe this is yyour first post of your work .... good work.
Keep it Real