# HiddenLineDrawingSegment.SideFill enum

Namespace: [Rhino.Geometry](https://developer.rhino3d.com/api/rhinocommon/namespace/rhino.geometry.md) · Assembly: [RhinoCommon](https://developer.rhino3d.com/api/rhinocommon/assembly/rhinocommon.md) · Since v6.0

```cs
public enum HiddenLineDrawingSegment.SideFill
```

When a silhouette is projected on the image plane (determined by the camera location or direction), and projects to a curve (not a point), the image area to the left or right of a projected silhouette curve is filled with either the surface or a void.

## Values

| Name | Value | Description |
| --- | --- | --- |
| SideUnset | 0 | Unset |
| SideSurface | 1 | Surface |
| SideVoid | 2 | Void |
| OtherSurface | 3 | Other Surface |