Has the main shuttlebay ever been done in any form of concept designs or any form of graphic at all, apart from what we see on both sets of the Ent-D blueprints.
There was that partial miniature we saw at the end of "Cause and Effect," otherwise no.
Given the amount of natural light pouring into the room when Data and Troi are searching for Spot at the end of Generations,
I wonder if they were trying to substitute that set for the main shuttlebay? (even though the establishing shot of the 12' saucer shows the door closed)