## How convert 3D face to 2D in AutoCAD?

To Convert 3D Polylines to 2D

1. Click Modify tab Design panel Convert 3D To 2D Polylines Find.
2. Select the polyline(s) to convert. Press Enter.

### How do you make a 3D polyline?

To create polyline using available points in the drawing do following:

1. Start 3D polyline command (command: “3DPOLY”)
2. While still in command type ‘PO (“Point Object” transparent command) in command-line.
3. Click the first point and then on any subsequent points to create the desired line.
4. Hit Enter key.

How do you offset a 3D polyline?

Enter the offset method [/Constant/Variable/Surface/Multiple]: press Enter

1. Enter the offset method [/Constant/Variable/Surface/Multiple]: press Enter.
2. Vertical/: 15.
3. Percent/Ratio/Vertical offset amount <0>: 10.
4. Select a polyline to offset (Enter for none): select a 3D poly.

How do you convert a polyline to a 2D feature line?

Converting to a 2D Polyline is done using the “Convert 3D to 2D Polylines” (AeccConvert3dPolys) command found on the Modify tab, Design panel drop-down. After converting the 3D Polyline to an object that can support curves rather than line segments, we can proceed to clean up our curves.

## How do you create a surface in Civil 3d from feature lines?

To Add a Feature Line to a Surface as a Breakline

1. Right-click a feature line Add To Surface As Breakline. Note: If there are no surfaces in the drawing, you are prompted to create one.
2. In the Select Surface dialog box, select a surface, and click OK.
3. In the Add Breaklines dialog box, specify the breakline options.

### Can you convert a 3D polyline to 2D?

Use the Convert 3D To 2D Polylines command to convert 3D to 2D polylines. The new polyline will take on the elevation of the start point of the 3D polyline. Click Modify tab Design panel Convert 3D To 2D Polylines Find.

How do I offset a line in Autocad 3D?

To Offset an Object

1. Click Home tab Modify panel Offset. Find.
2. Specify the offset distance. You can either enter a value or use the pointing device to determine a distance with two points.
3. Select the object to offset.
4. Specify a point to indicate whether the object is to be offset inside or outside of the original object.