Issue: Users can select surfaces by name and see them in Object Inspector, but no contours, triangles, or labels appear — even when using a style known to work.
Cause: This often happens when:
-
The drawing is using different Coordinate Systems than the surface’s source data (placing it far off-screen).
-
The display order is broken (surfaces behind large hatches or masks).
-
Level of Detail (LOD) is dynamically simplifying the surface.
-
Corruption exists in the surface definition after copy/paste between drawings.
Solution:
-
Step 1: Zoom to Surface Extents – Use ZOOMEXTENTS on the surface to see if it’s 100k ft away. If so, adjust drawing coordinate system or re-import.
-
Step 2: Check Draw Order – Right-click the surface > Draw Order > Bring to Front.
-
Step 3: Turn Off LOD – Toggle the Level of Detail button in the status bar so all triangles display.
-
Step 4: Audit Surface Definition – Rebuild the surface (Prospector > Rebuild). If it still fails, use LANDXML export and re-import to rebuild a clean surface object.
-
Step 5: Validate Data Shortcuts – If the surface is a DREF, check that the source drawing is up to date and properly synchronized.
Advanced trick: Use QSAVE > close > re-open the drawing after a rebuild. Civil 3D often displays the surface correctly after a fresh graphics initialization.
