Import Site Context: 3D Massing and 2D Linework

1. In Rhino, split the context into two exports:
   1. 3D massing (buildings, main forms):
      • Select only the building masses.
      • Use File → Export Selected.
      • Save as SAT or as a DWG containing solids (e.g. massing.sat).
   2. 2D linework (streets, pavements, plaza outlines, etc.):
      • Use selection tools like SelCrv to select all curves.
      • Use File → Export Selected.
      • Save as DWG (e.g. context_2d.dwg).
2. In Revit, link the 2D context:
   1. Insert → Link CAD.
   2. Choose context_2d.dwg.
   3. Set Positioning to Origin to Internal Origin.
   4. Place at Level 0 and click Open.
3. Link the 3D massing:
   1. Insert → Link CAD or Link Revit/Import CAD (depending on format).
   2. Select massing.sat (or the DWG with solids).
   3. Use the same Origin to Internal Origin option and Level 0.
4. Verify alignment:
   1. Open a 3D View and confirm the 3D masses sit directly above the 2D context.
   2. Open the relevant plan view (e.g. Level 0 or Site) and ensure the plan linework matches the buildings.

Tip: Keeping 3D masses and 2D linework in separate links gives you independent control over their visibility, lineweights, and print settings.

---

Taught in

• BIM + Computational Workflow · 2023 — original class recording lives there.