The scene looks good. You might consider adding D.O.F. to get more separation between the table edge and the wall/window. Yeah, I see that effect on the upper quadrant of the lip of the glass. It looks like the vertices don't match up at that one point, which might be due to a bad point on the spline curve. Like a corner point instead of a smooth spline point, or one with mismatched slope or 2nd derivative (flip).