3D Max

How to Extrude in 3D Max?

Understanding Extrusion in 3ds Max

Extrusion is an essential technique in 3D modeling, particularly within Autodesk’s 3ds Max software. This feature allows users to transform flat 2D shapes into three-dimensional objects, adding depth and complexity to their designs. By utilizing the extrude modifier, you can manipulate vertices, edges, and faces to create intricate 3D structures from basic 2D outlines.

How to Access the Extrude Tool

To begin the extrusion process in 3ds Max, follow these steps to access the extrude functionality:

  1. Select an Editable Object: Start by choosing a shape that you intend to extrude. It can be a 2D shape drawn within 3ds Max or an existing 3D object that can be edited.

  2. Switch to Editable Poly: Make sure your selected object is either an “Editable Poly” or “Edit Poly.” To convert an object, right-click on it and select "Convert to" followed by "Editable Poly."

  3. Navigate the User Interface: Go to the ribbon at the top of the screen and click on the “Modeling” tab.

  4. Access the Polygons Panel: In the “Polygon Modeling” section, enable the “Polygon” sub-object level. This will allow you to work with individual faces of your selected shape.

Extruding in 3ds Max: Step-by-Step Guide

Once you are set up to use the extrude tool, follow these detailed steps to perform the extrusion:

  1. Select Polygons to Extrude: Click to select the polygon(s) you’d like to extrude. You can hold down the Ctrl key to select multiple polygons if needed.

  2. Activate the Extrude Tool: Either click on the “Extrude” option in the Polygons panel or use the shortcut by holding down the Shift key and clicking on the extrude button.

  3. Adjust Extrude Settings: After activating the tool, a pop-up window will appear where you can set the parameters for your extrusion. You can specify the height of the extrusion, enabling a more controlled transformation.

  4. Confirm the Operation: Once you’ve set your desired extrusion height, finalize the process by clicking OK. Your selected polygons will now extend outward, giving them a three-dimensional form.

Exploring Additional Techniques

There are several advanced methods to customize your extrusion technique further:

  • Extruding Along Normals: For creating effects like flares or varying depths, consider extruding along the surface normals. This can be achieved by selecting the “Extrude Along Normals” option in the extrude settings, allowing for deformation in relation to the surface direction.

  • Combining with Other Modifiers: To achieve more complex shapes, combine the extrusion process with other modifiers like Bend or Twist. After extruding your shape, apply these modifiers to enhance the design and add dynamic features.

Frequently Asked Questions

What types of objects can I extrude in 3ds Max?
You can extrude any geometry that is compatible with the editable poly format, including 2D shapes like circles, squares, or custom drawings converted into poly objects.

Can I undo an extrusion if I don’t like the result?
Yes, 3ds Max has an undo feature. Simply press Ctrl + Z to revert the last action, including any extrusion operations you’re not satisfied with.

Is it possible to extrude along a path in 3ds Max?
While the standard extrude function applies height to selected polygons, for path-based extrusions, consider using the Loft or Sweep modifiers, allowing for extrusion along defined curves.

About the author

Wei Zhang

Wei Zhang

Wei Zhang is a renowned figure in the CAD (Computer-Aided Design) industry in Canada, with over 30 years of experience spanning his native China and Canada. As the founder of a CAD training center, Wei has been instrumental in shaping the skills of hundreds of technicians and engineers in technical drawing and CAD software applications. He is a certified developer with Autodesk, demonstrating his deep expertise and commitment to staying at the forefront of CAD technology. Wei’s passion for education and technology has not only made him a respected educator but also a key player in advancing CAD methodologies in various engineering sectors. His contributions have significantly impacted the way CAD is taught and applied in the professional world, bridging the gap between traditional drafting techniques and modern digital solutions.