Bevel Modifier

The Bevel Modifier adds the ability to bevel the edges of the mesh it is applied to, allowing control of how and where the bevel is applied to the mesh.

The Bevel Modifier is a non-destructive alternative to the Bevel Operation in Edit Mode.

../../../_images/modeling_modifiers_generate_bevel_square-not.png

Not beveled.

../../../_images/modeling_modifiers_generate_bevel_square.png

Beveled.

The images above show the side views of a plain (not beveled) cube and a beveled one.

Options

Width

The size of the bevel affect. See Width Method below.

../../../_images/modeling_modifiers_generate_bevel_cubes.png

Three Cubes with 0.1, 0.3 and 0.5 bevel Widths.

Segments
The number of edge loops added along the bevel's face.
Profile
The shape of the bevel, from concave to convex. It has no effect if Segments is less than 2.
Material
The index of the material slot to use for the bevel. When set to -1, the material of the nearest original face will be used.
Only Vertices

When enabled, only the areas near vertices are beveled; the edges are left not beveled.

../../../_images/modeling_modifiers_generate_bevel_cubes-vertices-only.png

Three cubes with 0.1, 0.3 and 0.5 bevel Widths, with Only Vertices option enabled.

Clamp Overlap
When enabled, the width of each beveled edge will be limited such that they cannot intersect each other. Edges that are far apart will still bevel with the full width, only edges too close to each other are affected.
Loop Slide
If there are unbeveled edges along with beveled edges into a vertex, the bevel tries to slide along those edges when possible. Turning the option off can lead to more even bevel widths.
Mark Seams
If a seam edge crosses a non-seam one and you bevel all of them, this option will maintain the expected propagation of seams.
Mark Sharp
Similar to Mark Seams, but for sharp edges.
Harden Normals
When enabled, the per-vertex face normals of the bevel faces are adjusted to match the surrounding faces, and the normals of the surrounding faces are not affected. This will keep the surrounding faces flat (if they were before), with the bevel faces shading smoothly into them. For this effect to work, custom split normals need to be enabled, which requires Auto Smooth to be enabled (see Normals).
Limit Method

Used to control where a bevel is applied to the mesh.

None
No limit, all edges will be beveled.
Angle
Only edges where the adjacent faces form an angle smaller than the defined threshold will be beveled. Intended to allow you to bevel only the sharp edges of an object without affecting its smooth surfaces.
Weight
Use each edge's bevel weight to determine the width of the bevel. When the bevel weight is 0.0, no bevel is applied. See here about adjusting bevel weights.
Vertex Group
Use weights from a vertex group to determine the width of the bevel. When the vertex weight is 0.0, no bevel is applied. An edge is only beveled if both of its vertices are in the vertex group. See here about adjusting vertex group weights.
Width Method

Declares how Width will be interpreted to determine the amount of bevel.

../../../_images/modeling_modifiers_generate_bevel_width-methods.png

Width methods.

Offset
Value is interpreted as the distance from the original edge to the edge of the beveled face.
Width
Value is interpreted as the distance between the two new edges formed by the bevel.
Depth
Value is the perpendicular distance from the new bevel face to original edge.
Percent
Similar to Offset but the value is interpreted as a percentage of the adjacent edge length.
Set Face Strength Mode

Set Face Strength on the faces involved in the bevel, according to the mode specified here. This can be used in conjunction with a following Weight Normals Modifier (with the Face Influence option checked).

None
Do not set face strength.
New
Set the face strength of new faces along edges to Medium, and the face strength of new faces at vertices to Weak.
Affected
In addition to those set for the New case, also set the faces adjacent to new faces to have strength Strong.
All
In addition to those set for the Affected case, also set all the rest of the faces of the model to have strength Strong.
Miter Patterns

A miter is formed when two beveled edges meet at an angle. On the side where the angle is greater than 180 degrees, if any, it is called an outer miter. If it is less than 180 degrees, then it is called an inner miter. The outer and inner miters can each be set to one of these patterns:

Sharp
Edges meet at a sharp point, with no extra vertices introduced on the edges.
Patch
Edges meet at a sharp point but in addition, two extra vertices are introduced near the point so that the edges and faces at the vertex may be less pinched together than what occurs in the Sharp case. The Spread slider controls how far the new vertices are from the meeting point. (This pattern does makes no sense for inner miters, so behaves like Arc for them.)
Arc
Two vertices are introduced near the meeting point, and a curved arc joins them together. The Spread slider controls how far the new vertices are from the meeting point. The Profile slider controls the shape of the arc.

The miter patterns are shown in these diagrams:

../../../_images/modeling_meshes_editing_subdividing_bevel_miter-2.png

Sharp outer miter.

../../../_images/modeling_meshes_editing_subdividing_bevel_miter-3.png

Patch outer miter.

../../../_images/modeling_meshes_editing_subdividing_bevel_miter-4.png

Arc outer miter.

../../../_images/modeling_meshes_editing_subdividing_bevel_miter-5.png

Sharp inner miter.

../../../_images/modeling_meshes_editing_subdividing_bevel_miter-6.png

Arc inner miter.

Spread
The value used to spread extra vertices apart for Outer and Inner Miters.