3DFACE Command In AutoCAD : Creates A Three-sided Or Four-sided Surface In 3D Space

If you’re looking for a clear, practical guide to using the 3DFACE command in AutoCAD, this article explains what the command does, how to use it step‑by‑step, common problems and fixes, alternatives, and useful tips to work faster.

Table of Contents

What is the 3DFACE command?

The 3DFACE command in AutoCAD creates a planar surface defined by three or four 3D points. It is useful for building simple triangular or quadrilateral faces when modeling surfaces, quick visualization, or preparing a basic mesh of planar patches. A 3D face is not a solid — it’s a single planar object that can form part of a larger surface model.

Key points:

Creates 3‑sided (triangular) or 4‑sided (quadrilateral) planar faces.
Useful for quick surface patches, terrain triangulation, or as construction geometry.
Faces are single planar entities (not solids) and can be combined with other modeling tools.

How to use 3dface command (Step by step)

Shortcut

Command name: 3DFACE
Type 3DFACE (or select the 3D Face tool in the 3D modeling workspace) and press Enter.

Basic step‑by‑step

Start the command: type 3DFACE and press Enter.
AutoCAD prompts: First point: — click in the drawing area or enter coordinates (e.g., 0,0,0).
Second point: — click or enter coordinates (e.g., 10,0,0).
Third point: — click or enter coordinates (e.g., 0,10,5).
For a triangular face: after entering the third point, press Enter. AutoCAD will create a 3‑point face.
For a quadrilateral face: enter a fourth point (e.g., 10,10,0) and press Enter; the face will use all four points.

Notes:

Points can be picked with the cursor or entered as X,Y,Z coordinates for precise placement.
If you want multiple faces in one command, AutoCAD may allow repeating the sequence depending on your version; otherwise run 3DFACE repeatedly.

Options and behaviors

Three points → triangle. Four points → quadrilateral.
If you specify collinear or duplicate points, the face will have zero area and may be invisible.
Faces are planar; if four points are not coplanar, AutoCAD will still create a 4‑point face but it will be a planar surface through the first three points and the fourth will be projected to that plane, which may produce unexpected geometry. To model truly nonplanar patches, use mesh or surface tools.

Examples (before and after)

Example 1 — simple sloped triangular face:

Before: three 3D points (0,0,0), (10,0,0), (0,10,5).
Command: 3DFACE → pick those points → press Enter.
After: a triangular planar face sloped in Z direction — useful to represent a single sloped panel of a roof or terrain triangle.

Example 2 — rectangular panel:

Before: four corner points (0,0,0), (10,0,0), (10,10,0), (0,10,0).
Command: 3DFACE → pick the four corners in sequence → Enter.
After: a flat quadrilateral face that can act as a panel or part of a larger surface.

Example 3 — patching a hole:

Before: a void in a mesh/surface where a planar patch is desired.
Command: Create 3DFACE(s) to cover the hole using boundary points.
After: hole filled by planar faces (may require further smoothing or conversion to surface/mesh).

When 3dface doesn’t work — common problems and fixes

Problem: Nothing appears after creating the face

Check the layer: make sure the face is not on a turned‑off or frozen layer.
Zoom and regenerate: run REGEN or REGENALL and use Zoom Extents to ensure the object is not off‑screen.
Points were coincident or collinear: verify the coordinates—duplicate or collinear points create zero‑area faces.
Display style: in some visual styles (with backface culling or certain shaded modes) faces can appear differently; switch to 2D Wireframe or Conceptual to confirm.

Problem: The face looks inverted or faces wrong side in render

Face normal orientation can affect shading; recreate the face with the points entered in the opposite order or use surface tools to flip normals where available.
For rendering issues, use higher fidelity visual styles or convert faces to proper surfaces/meshes.

Problem: The fourth point makes the face nonplanar

If your four points are not coplanar, the resulting face may be warped or projected unexpectedly. Solution: split into two triangular 3DFACE objects (create two triangles that together approximate the quad), or use mesh/surface tools (LOFT, PATCH, MESH) for nonplanar patches.

Problem: Precision or scale issues (tiny faces or huge coordinates)

Check units and coordinate scale; very large or tiny coordinates can cause display or numeric precision issues. Use UCS and units appropriate to the project or move geometry closer to the origin.

Problem: Command not available in your workspace or menu

Make sure you are in a workspace that supports 3D modeling or that the Command alias is active. You can still type 3DFACE at the command line.

Alternative methods and commands

When 3DFACE is not ideal, consider these alternatives depending on your goal:

3DPOLY (3D polyline): Create 3D polylines to define paths or boundary edges for surfaces.
REGION → EXTRUDE/SHELL: convert closed planar curves to a REGION then EXTRUDE to create solids.
SURFACE / LOFT: use LOFT, SWEEP, or PATCH for smooth surfaces between cross sections.
MESH / CONVTOMESH: create and edit polygonal meshes when you need nonplanar, subdividable geometry.
PRESSPULL or EXTRUDE on closed 2D geometry to get solids instead of faces.
Use the Surface ribbon tools for advanced surfacing (Blend, Patch, Sculpt).

Choose alternatives when you need:

Smooth, continuous surfaces → use Loft/Patch/Lofted Surfaces.
solid geometry → use Extrude/Presspull to produce solids.
Editable subdivision geometry → use Mesh tools.

Tips for efficient use

Use OSNAP and exact coordinate entry (X,Y,Z) for accurate placement.
Work with the 3D Modeling workspace and use standard views (SE ISOMETRIC, Top, Front) to place points more accurately.
If modeling a larger surface from many faces, keep a consistent point ordering (clockwise or counterclockwise) to maintain consistent normals.
To make accurate triangular meshes from contours, consider exporting points to a dedicated mesh/terrain tool or use civil/terrain tools for triangulation.
Convert sets of coplanar 3DFACE objects into a single surface or region when possible to simplify editing.
Use layers to organize faces by material or purpose (e.g., terrain, roof panels, temporary construction geometry).

FAQ

What is the difference between 3DFACE and a 3D solid?

A 3DFACE is a single planar surface defined by three or four points. A 3D solid (created with EXTRUDE, BOX, etc.) is a volumetric object with thickness and mass properties. Use 3DFACE for surface patches and solids for physical volumes.

How do I create a triangular face instead of a quad?

When prompted for the fourth point, simply press Enter after the third point. AutoCAD will create a triangle (3‑point face).

My 3DFACE is invisible in shaded view — why?

It can be due to visual style/backface culling, face normals, or the face being on an off/frozen layer. Try switching to 2D Wireframe, check layer visibility, REGEN, and recreate the face with reversed point order if normals are an issue.

Can I edit a 3DFACE after creating it?

You can move its vertices or erase and recreate it. For more advanced edits (splitting, smoothing, or converting to complex surfaces), convert or rebuild the geometry using MESH, SURFACE, or REGION/EXTRUDE workflows.

Is 3DFACE suitable for complex curved surfaces?

No — 3DFACE is for planar patches only. For curved or smoothly varying surfaces use Loft, Sweep, Patch, Surfaces, or Mesh tools which support nonplanar geometry and continuity.

How do I flip a face normal if the shading looks wrong?

If shading or rendering looks inverted, recreate the face with the point order reversed (pick the vertices in the opposite sequence) or use surface tools that include a flip normal option. Some visual styles also let you show double‑sided faces for diagnostics.

Can I export 3DFACE geometry to other software?

Yes. 3DFACE objects are basic geometry and are usually exportable via DWG/DXF. For better interoperability with modeling packages, convert faces to meshes or solids (where applicable) before exporting.