I created this floor plan in Illustrator which was what I was to base my abandoned hospital environment on. I had to use a gridded background to ensure that I got all of the measurements correct and to scale.
Layout Floor plan
I then transferred my floor plan into Layout. This would then enable me to take the 2D plan and make it 3D.
Perspective Floor plan
This is my environment after all of the walls have been built and extruded to make it 3D.