If you need to experiment with some options while editing Civil 3D Surfaces, the “Snapshot” function could help. Below is what Civil 3D Help File has to say:
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A snapshot is a surface operation that captures the current state of surface. In Toolspace, on the Prospector tab, expand the Surfaces collection, right-click the surface, and click Create Snapshot. The current surface points and triangles resultant from previous surface operations are contained in a surface snapshot operation. When a surface is built, previous surface operations are ignored and the surface build begins at the snapshot operation. Surface operations that are included in the snapshot are marked with [camera icon] in the Prospector tree. Snapshots can also be created automatically. A LandXML setting enables you to specify that a surface snapshot be created in the surface definition subsequent to the importing of a surface when using Import LandXML. |
It is a safeguard, allowing surfaces to hold their built state, regardless of what happens to the items in the history before that point. Perhaps best used when pasting surfaces, see example below
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Original Surfaces |
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Boundary Edit - No Snapshot |
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Boundary Edit- With Snapshot |
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