Rigging & animation · Beginner

Bone

One rigid piece of a 3D skeleton that moves the mesh around it

What is a bone in 3D animation?

A bone is one rigid segment of a 3D character’s skeleton, with a head where it pivots and a tail that points toward the next bone. Rotating a bone moves the part of the mesh tied to it, so a forearm bone carries the forearm skin along.

Think of it like this

A bone works like one stick in a jointed wooden drawing mannequin: turn the stick and everything fixed to it turns too.

Where it fits in a 3D project

  1. Create
  2. Surface
  3. Rig
  4. Animate
  5. Render
  6. Export

Rig: Adding a skeleton and controls so the model can move.

Rotate each jointForward kinematics: the hand follows the arm
With FK you rotate each joint in turn, from the shoulder down.

How a bone works

  1. 01You add a bone inside the mesh, starting at the joint where it should pivot.
  2. 02Bones link into chains, so each child bone follows the one it hangs from.
  3. 03Skinning ties nearby vertices to the bone, with a weight for how strongly.
  4. 04You rotate the bone, and the tied vertices move with it.

Bone vs joint

PropertyBoneJoint
What it isA segment with length and directionThe pivot where two segments meet
In BlenderThe thing you select and rotateThe head or tail of a bone
In MayaDrawn between joints for displayThe object you create and rotate

They describe the same skeleton from two angles: some apps have you place bones, others joints, and posing works the same way.

Where a bone is used

  • Bending limbs, spines and fingers on characters
  • Opening jaws, closing eyelids and swinging tails
  • Hinged doors, lids and mechanical parts

Beginner tip

Name bones as you add them, with a left or right suffix such as arm.L. Mirroring tools and weight painting rely on those names, and renaming later is tedious.

Terms related to a bone

Bone FAQ

How do bones work in Blender?
In Blender, bones live inside an armature object. You add and shape them in Edit Mode, then rotate them in Pose Mode. Parenting the mesh to the armature with automatic weights ties the surface to the bones.
How many bones does a character need?
It depends on how it will move. A simple game character can move well with a few dozen bones for the spine, limbs and head. Fingers, faces and loose clothing add many more. Use as few as the motion needs.
Do bones show up in the final render?
No. Bones are invisible helpers that only exist to move the mesh. A render shows the posed surface and never the bones themselves.

Updated October 29, 2026 · Browse all 3D terms