Lines with architectural styling
Bounding box in 2D drawing space
Section configuration used
Cut polygons (for hatching)
OptionallayerOpaque base cross-sections (one set per multi-material entity) drawn behind
the per-layer fills in the 3D section overlay so a cut never reads hollow.
Consumed ONLY by the 3D overlay; absent from cutPolygons so the flat 2D
drawing, SVG export, and measure/snap paths are unaffected. Empty/omitted
when no multi-material (layered) element is cut.
Layer definitions
All classified lines
Opening relationships used
Projection polygons (visible surfaces beyond cut)
Processing statistics
Architectural symbols (door swings, etc.)
Enhanced 2D drawing with architectural features