Civil 3D 2025: Corridor Surface Boundary auto-extraction & volume disparity

bimusers.com API Specialist • 327 pts 1 week ago

177 views 1 answers

Technical Context

SoftwareCivil 3D 2025

Language / APICivil 3D Subassemblies

We are running cut/fill earthwork volumes between an existing ground surface and an extracted corridor datum surface. In complex day-lighting transitions, the TIN triangulation extends beyond daylight lines.

Is adding 'Corridor Extents as Outer Boundary' sufficient, or should we use Feature Line boundaries?

#civil3d #corridor #surfaces #volumes #grading

1 Answers

bimusers API Specialist 1 week ago

Corridor Extents as Outer Boundary can produce bow-tie triangulation artifacts at sharp horizontal tangent changes. The most reliable production workflow:

In Corridor Properties → Boundaries, add Daylight_Cut and Daylight_Fill as Outer Boundaries using 'Corridor Extents'.
Under Corridor Feature Lines, toggle 'Connect Feature Lines across regions' to prevent boundary holes at region transitions.
If still crossing, extract the Daylight feature line and add it explicitly as a standard Hide Boundary on the Volume Surface.