Quote - do doors help?

That helps a little.  The tall thin door looks like a personnel door and that gives a feel to how really large the space is.  Also the lighting is better than in some of your earlier picture so the Airboss station looks more like a structure that would have people in it.  

Here are ea few other observations. 

The main bay doors are nearly the size of foot ball fields (American Football that is) and yet they just look like plain old house garage doors.

A similar problem with the lights, they look like regular dome lights just made a lot bigger.  Lights that look like those used for baseball parks might be better.

You may want to consider how and where the loading and unloading cargo and passengers is done and add details for this.  Same with fueling and maintenance.  Additionally what equipment is use for emergencies and where is kept.  Another thing to consider is the life support systems, heating, cooling, air recycling etc.

 

I personally feel that overall your landing bay is lacks interesting details.

 

BTW I consider Kibarreto’s Starcarrier to be your competition. (http://www.daz3d.com/i/3d-models/-/starcarrier?item=7061&_m=d ). 

So you may want to consider what is it about your landing bay that would make people want to buy and use it instead of another one?

Chris Cox