Oops, i didnt check the windows on your original reference with Erika. Youre right that the grid is quite thin there (while the frame is a lot thicker…). The problem there is that i have absolutely no idea how that window opens (its probably a sliding window, similar to the US types). But important is when building a 3d object to clearly know how it works in reality. So if you know how that window opens then fine, build it, but do it correctly.
The first French window youre showing is opening to the outside, which is very rare and explainable only with having a private little garden outside (not a public place). Windows generally open to the inside. (The reference is otherwise not bad, but you have to imagine the other side - or… ok, show a window opening to the outside, but im sure that people will notice that…)
The second ref with that overexposed French window is totally useless.*
Concerning BG: personally im not convinced that it isnt possible to remove that stupid red light, but ok… The thing is that all the other photos youre showing arent truly ideal. The sand beach you would have to try first to be able to judge, but having something behind the head of Erika wouldnt be bad. And the sun shouldnt be in the picture (regarding your lighting). The grass thing has a completely different mood and a road leading right to the window doesnt make much sense.
*: googled for fenster (window in German) and got already a possible ref on the first page:
http://www.sulser.ch/images/foto_produkte_fenster1_g.jpg
then i searched for large size only and got this right away:
http://schreinerei-leutenegger.ch/pic/fenster_gross_2.jpg
made then a quick search for fenetre to get some French results: (ok, its rather blurry, but usable and already not bad as result on the very first page…)
http://1.bp.blogspot.com/_r7qPK3cuucg/TNqmjcWii1I/AAAAAAAAF14/vHxYbpQJrNQ/s1600/Vue+sur+Mer.jpg