Windows Realism

Hello, I’m having trouble making my rendered windows look realistic in SketchUp. I downloaded a basic window model from Sketchup Warehouse and applied a simple color material, but they still appear unrealistic. Any tips for improving their realism?

There are 2 types of glass depending on the type you have modelled .

If it is a single face glass then there is a preset for that

If you have modelled glass with thickness or walls there is another type of glass for that.

Insert 2 panes that are thick, with seals and a spacer bar. Optionally, frames for opening parts, as well as hinges and handles. Just what for? Levitating radiator more spoil the “realism”.