Adding Extrusion

Extruding is one of the most common modeling tools to help us shape and build geometry for our mesh object. You can use extrusion to shape and form a rig to the desired shape.

In this guide, I'll show you different extrusion methods and how to fix the mesh afterward.

Manual Extrusion

In this example, I'll show you how to extrude the tie in this model and make it 3 dimensional using the manual extrusion method.

Select the mesh, go to Edit Mode, and select the faces you want to be extruded.

Press Alt+E and click on the Extrude Faces Along Normals option. After that, you can just move the mouse to extrude or use the Offset setting in the Operator panel. Also, enable the Offset Even setting to improve corners.

Solidify Extrusion

In this example, I'll show you how to give thickness to this suit model using the solidify modifier.

Select the mesh, go to the Modifier tab, and add a Solidify modifier.

Set the Offset setting to -1 or 1 depending on if you want to extrude the mesh inward or outward.

Use the Thickness setting to set the extrusion thickness. Also, enable the Even Thickness setting to improve corners. Optionally, enable the Only Rim setting if you want to remove the inner faces.

When you're done, you need to apply the Solidify modifier. This is so that it won't cause any deformation issues. To apply it, select the ⌵ icon on the panel header and then select Apply. Note that it is recommended that you move the modifier above as the first stack before applying it so it won't cause any issues.

Mesh UV Fix

When doing an extrusion, you might find texture issues like this in the mesh after extrusion.

To fix it, go to the UV Editor and modify the UV map by moving the glitched face UV to the correct spot on the texture.

Mesh Crease Fix

When doing an extrusion, you will encounter mesh warping issues on the edge of your mesh when the Subdivision Surface modifier is active.

To fix this, go to Edit Mode, select the edge with the warping issues, and then use the Mean Crease setting in the Sidebar > Item.

Make sure that you didn’t crease every edge and only crease the outside edge.

Mesh Smoothing Fix

When doing an extrusion, you will encounter normal shading issues on the edge of your mesh.

To fix this, go to Edit Mode, select the edge with the smoothing issues, right-click, and then select Mark Sharp.

Mesh Deformation Fix

Whenever you do an extrusion, you might find issues with mesh deformation. To fix this, you need to duplicate the mesh lattice, scale it, and then assign it to the extruded mesh.

In this example, I'll show you how to fix the deformation on this left arm mesh.

Go to the Outliner and enable the Disable Me and the Lattice collection. You can disable these collections again later.

Find and enable the lattice you need. In this example, I'm going to enable the DEF-Arm.Vanilla.L lattice. Duplicate it and rename it to DEF-Arm_Extrude.Vanilla.R or any name you want.