prompt start architectural reconstruction task convert this 2d floor plan into a geometrically accurate 3d building section model the floor plan is the only geometric authority no design interpretation no aesthetic optimization no interior styling preserve exact wall positions room boundaries and building outline the outer building shape must remain strictly orthogonal as drawn this is not an interior design visualization this is a technical architectural reconstruction geometry rules all walls must be modeled with visible structural mass exterior walls 24 cm interior walls 11 5 cm ceiling height 2 6 m floor slab visible thickness 20 cm doors and openings must match plan position exactly no relocation no resizing spatial rules the living dining kitchen area is one continuous open space do not subdivide wc storage and circulation spaces must remain compact and functional no visual enlargement kitchen rule wichtig kitchen must strictly follow wall alignment no free standing designer composition cabinets only where walls exist in the plan no ai interpretation rules do not beautify do not stage do not add decor no rugs plants cushions art mood lighting only basic placeholder furniture for scale if required view mode show model as an isometric architectural cutaway remove roof neutral white materials only no textures except slight floor tone difference between rooms final control line strict bim style reconstruction mode plan accuracy over realism if uncertain choose geometric simplicity not design prompt end