Batman Lego Movie elevator and shaft

[M2m]

Sorry to bother again and I only have this crappy picture 

 

Anybody know how the lift and the shaft was created? In this Shot it seems the lifts roof round plate directly touches the shaft. Also how where the shafts walls so slim and what about those round sliding doors. 

Finally the ground of the lift (not in the picture) seems to have a glowing hole - but it's all CGI I guess