boundary FILTER BY: all AutoCAD Civil 3D Autodesk Civil 3D Tip: Partial Surface Data References Civil 3D 2026 introduces a significant new feature called Partial Surface Data References. This allows the user to reference only a specific portion of a… AutoCAD Civil 3D Tip: Mask or Boundary? What's the Difference? Written by Bryan Sullivan. AutoCAD Civil 3D has many useful tools to alter and refine the output of surface models. We may want to alter the contour display…