If you have the TIN lines, Points, and Contours displayed while you perform surface edits you _____________ .

• A. will see the effect of the change immediately
• B. will see the effect after finishing
• C. nothing changes
• D. you must re-display

Answer: (D)

Refreshing the view is needed to visualize surface edits when TIN lines, Points, and Contours are shown. Civil 3D stores the edits to the surface, but the viewport may not redraw automatically while you’re editing. Re-displaying the surface forces a refresh/regeneration of the surface display, so the updated TIN geometry, points, and contour lines appear. Without this refresh, it can seem like nothing changed even though the edits were applied.