CREATING A VIEW through a window is simply a matter of deleting the original glass and adding an interior behind the windows. I’ve added a person as well for extra interest. But why does the left image, above, look fake?
It’s because there’s no glass in the windows. It’s easily fixed. Take a photograph of any suitable scene – a rural view, a cityscape, whatever might be reflected by that view – and add it just behind the window layer. Then reduce the opacity of this layer to around 10% to 20%. It’s barely noticeable, as you can see from the right image above (you might just be able to make out some foliage over the woman’s body and the picture top right), but it makes all the difference to making the image believable.
You can see a video version of this, and other common Photoshop errors, here.