
Brilliant Heri. 
so we only have a field of vision of 120*.
When looking the way we are walking, only 60* visibility on either side.
My screen is extra wide so I cannot accurately measure angles, so I am going to take a print off and get a protractor on that ... measure the angles that way
What would we do without our resident expert? Well done Heri
The problem with thos pictures is that you are presuming you go from the door of each by teleportation across the car park to the road.
You are also presuming that people do not move their heads when they walk.
That isn't the case.
As you walk across the car park the angle of the window to 5A opens up so that as you are walking into and out of the car park the window is in view.
This is particularly relevant to Matt Oldfield. He went to the next apartment and i find it impossible to believe when walking to his own apartment next door he did not look at the shutters of 5A.
What adds to the impossibility is the fact that white walls and shutters provide a constant contrast, which would be broken and noticeable if the shutters were, as descibed, "fully up". The black contrast from the bedroom and the white frame contrast of the exposed windows against that blackness from the window would be hugely noticeable and draw ones attention to that contrast.
Further to that as they were checking each others apartment it is impossible to believe they did not glance over to the windows and shutters. After all we are led to believe a few minutes earlier Matt did a visual check at the shutters.
It is also impossible to believe that after going to his apartment and walking past the shutter at 5A and then performing the room check (which coincidentally he did not see Madeleine) and noticing there was more light in the room this did not prompt him, subconciously, to recall what he had seen a few minutes earlier on his walk past the shutters of 5A.
It stretchs credibility.