Choose a terrain editing method
Choose points, brush strokes or grading objects, then inspect the proposed terrain.
Terrain Surface Editing — Sculpt, Volume Points, GradingChoose a terrain editing method to match the kind of change you need. Volume points control elevations at individual locations; sculpting builds a surface with brush strokes; grading objects describe bounded or linear changes that remain editable. All depend on the available terrain model.
Shape with points or a brush
Choose Model → Volume Points to add and edit control points. Choose Spray Sculpt to work with a brush. Their Inspector controls differ; use the matching article rather than expecting every surface control in one panel.
Create a level or sloping area
Use Pad for a bounded level area or Sloped Pad for a bounded sloping area. Draw at least three points for the polygon and press Enter to finish. Esc cancels the unfinished polygon, after clearing active numeric input or snap references if needed. Select the result to edit its elevation and transition controls. Read the tool guide and any before-commit quantities or overlap warnings.
Control edges and drainage
Use Breakline or Retaining Wall for a line constraint, Grade Limits for an envelope, and Drainage for a drainage line. These are editable terrain objects. A terrain modifier does not by itself create a matching physical building component.
Check the proposal
Use Existing, Proposed and Compare views to understand which changes belong to the design. Analyze offers profiles, regions and slope readings. Toggle overlays through Display. Inspect cut and fill quantities against the correct baseline before relying on them.
Undo and continue
Edits use drawing history. Undo the operation you need to reverse, then recheck the visible terrain and selected object. Closing the workspace does not turn all preceding operations into one undo step.