Many times it is not the quality but the unique subject of photos that conveys the message. Such is the case here. This is a rather tight basement where the owner wished to maximize layout opportunity. This shape traces the track plan so all unused right of way becomes aisle space.
The top photo displays the modular framework:
Next view is from the bottom of the stair case:
Opposite end view:
Layouts can be constructed in place to work around any obstructions.
Building in place was very important in this very tight urban townhouse.