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.. _bpy.types.BevelModifier:
**************
Bevel Modifier
**************
The *Bevel* modifier bevels the edges of the mesh it is applied to,
with some control of how and where the bevel is applied to the mesh.
It is a non-destructive alternative to
the :doc:`Bevel Operation </modeling/meshes/editing/subdividing/bevel>` in Edit Mode.
.. list-table:: Side views of a cube.
:align: center
* - .. figure:: /images/modeling_modifiers_generate_bevel_square-not.png
:width: 150px
Not beveled.
- .. figure:: /images/modeling_modifiers_generate_bevel_square.png
:width: 150px
Beveled.
Options
=======
.. figure:: /images/modeling_modifiers_generate_bevel_panel.png
:align: right
The Bevel modifier.
Width
The size of the bevel effect. See *Width Method* below.
.. figure:: /images/modeling_modifiers_generate_bevel_cubes.png
:width: 350px
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 remain unchanged.
.. figure:: /images/modeling_modifiers_generate_bevel_cubes-vertices-only.png
:width: 350px
Three cubes with 0.1, 0.3 and 0.5 bevel widths, with *Only Vertices* option enabled.
Clamp Overlap
Limits the width of each beveled edge so that edges cannot cause
overlapping intersections with other geometry.
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,
you need custom normals data, which requires *Auto Smooth* option to be enabled
(see :doc:`Normals </modeling/meshes/editing/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 :doc:`here </modeling/meshes/editing/edges>` 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 :doc:`here </modeling/meshes/properties/vertex_groups/vertex_groups>` about adjusting vertex group weights.
Width Method
Declares how *Width* will be interpreted to determine the amount of bevel.
.. figure:: /images/modeling_modifiers_generate_bevel_width-methods.png
:align: right
:width: 240
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
:doc:`Weighted Normals </modeling/modifiers/modify/weighted_normal>` 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.
This pattern does makes no sense for inner miters, so it behaves like *Arc* for them.
The *Spread* slider controls how far the new vertices are from the meeting point.
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.
.. list-table:: Diagrams of the miter patterns.
* - .. figure:: /images/modeling_meshes_editing_subdividing_bevel_miter-2.png
Sharp outer miter.
- .. figure:: /images/modeling_meshes_editing_subdividing_bevel_miter-3.png
Patch outer miter.
- .. figure:: /images/modeling_meshes_editing_subdividing_bevel_miter-4.png
Arc outer miter.
* - .. figure:: /images/modeling_meshes_editing_subdividing_bevel_miter-5.png
Sharp inner miter.
- .. figure:: /images/modeling_meshes_editing_subdividing_bevel_miter-6.png
Arc inner miter.
- ..
Spread
The value used to spread extra vertices apart for non-sharp miters.
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