Bone

Inherits from: Attachment → Instance → Object

Bones are non-rendered objects that drive the movement of one or more parts for the purposes of animation, or creating clothing and characters. Bones are part of a Model or MeshPart object's skeletal rig that you typically access and animate through the Animation Editor.

Rigs are created during the modeling process in third-party software such as Blender or Maya. After importing the rigged model into Studio, you can add the model directly to your experience, or save and share the model as an asset. See Rigging for more details on creating and using rigged models.

Note that you can parent Bones under other Bones and parts. When parenting a bone to another bone, the child bone's world position will be relative to the parent bone's position, and the hierarchy of parented Bone objects can change the behavior of affected parts during posing or animation.

Relationship with Motor6D

To support animations with older rigs using joints, such as Motor6D, you can use the Bone.Transform property in the same way as Motor6D.Transform. Roblox uses the offset of the bones from the default pose to drive an animation, and bones are not replicated or serialized.

Bone.CFrame

Bones inherit the CFrame property of Attachments which Roblox uses as the bone's reference position. The inherited WorldCFrame and other world properties return the initial un-transformed position.

Inherits from: Attachment

Memory category: Instances

Properties

Name	Type / Returns	Description
Bone.Transform	CFrame	Determines the current animated offset of the bone in its local space.
Bone.TransformedCFrame	CFrame	Describes the combined `CFrame` offset of the bone and the current animation offset in the bone local space.
Bone.TransformedWorldCFrame	CFrame	Describes the combined `CFrame` offset of the bone and the current animation offset in world space.

Inherited from Attachment

Name	Type / Returns	Description
Attachment.Axis	Vector3	Direction of the X axis of the attachment, represented as a unit `Vector3`.
Attachment.CFrame	CFrame	`CFrame` offset of the attachment.
Attachment.Orientation	Vector3	Orientation of the attachment relative to the orientation of its parent.
Attachment.Position	Vector3	Positional offset of the attachment, relative to the position and orientation of its parent.
Attachment.Rotation	Vector3	Rotation of the attachment relative to the rotation of its parent.
Attachment.SecondaryAxis	Vector3	Direction of the Y axis of the attachment, represented as a unit `Vector3`.
Attachment.Visible	boolean	Toggles the in-experience visibility of the attachment.
Attachment.WorldAxis	Vector3	Direction of the X axis of the attachment relative to the world, represented as a unit `Vector3` with a length of 1.
Attachment.WorldCFrame	CFrame	The exact `CFrame` of the attachment in world space coordinates.
Attachment.WorldOrientation	Vector3	Orientation of the attachment relative to the world rather than its own parent.
Attachment.WorldPosition	Vector3	Position of the attachment relative to the world rather than its own parent.
Attachment.WorldRotation	Vector3	Rotation of the attachment relative to the world rather than its own parent.
Attachment.WorldSecondaryAxis	Vector3	Direction of the Y axis of the attachment relative to the world, represented as a unit `Vector3` with a length of 1.

Inherited from Instance

Name	Type / Returns	Description
Instance.Archivable	boolean	Determines if an `Instance` and its descendants can be cloned using `Instance:Clone()`, and can be saved/published.
Instance.archivable	boolean
Instance.Capabilities	SecurityCapabilities	The set of capabilities allowed to be used for scripts inside this container.
Instance.IsInSandbox	boolean	Indicates whether the instance is inside a sandboxed container.
Instance.Name	string	A non-unique identifier of the `Instance`.
Instance.Parent	Instance	Determines the hierarchical parent of the `Instance`.
Instance.PredictionMode	PredictionMode	Reflects the client-side prediction mode applied to the instance under server-authoritative physics.
Instance.RobloxLocked	boolean	A deprecated property that used to protect `CoreGui` objects.
Instance.Sandboxed	boolean	When enabled, the instance can only access abilities in its `Capabilities` list.
Instance.UniqueId	UniqueId	A unique identifier for the instance.

Inherited from Object

Name	Type / Returns	Description
Object.ClassName	string	A read-only string representing the class this `Object` belongs to.
Object.className	string

Bone.Transform

Transform determines the current animated offset of the bone relative to its CFrame. This property is set by Roblox when animations on skinned meshes are played, although it can be manipulated manually in a manner similar to Motor6D.Transform.

Field	Value
type	CFrame
tags	["NotReplicated"]
security	{"read":"None","write":"None"}
thread safety	ReadSafe
category	Transform
serialization	{"can_load":true,"can_save":false}
capabilities	["Basic","Animation"]

Bone.TransformedCFrame

TransformedCFrame describes the combined CFrame offset of the bone and the current animation offset (Transform) in the bone's local space.

Field	Value
type	CFrame
tags	["Hidden","ReadOnly","NotReplicated"]
security	{"read":"None","write":"None"}
thread safety	ReadSafe
category	Derived Data
serialization	{"can_load":false,"can_save":false}
capabilities	["Basic","Animation"]

Bone.TransformedWorldCFrame

TransformedWorldCFrame describes the combined CFrame offset of the bone and the current animation offset (Transform) in world space.

Field	Value
type	CFrame
tags	["ReadOnly","NotReplicated"]
security	{"read":"None","write":"None"}
thread safety	Unsafe
category	Derived World Data
serialization	{"can_load":false,"can_save":false}
capabilities	["Basic","Animation"]

Methods

Inherited from Attachment

Name	Type / Returns	Description
Attachment:GetAxis	Vector3	Returns the value of the attachment's `Axis`.
Attachment:GetConstraints	List	Returns a list of `Constraints` connected to the attachment.
Attachment:GetSecondaryAxis	Vector3	Returns the value of the attachment's `SecondaryAxis`.
Attachment:SetAxis	()	Sets the value of the attachment's `Axis`.
Attachment:SetSecondaryAxis	()	Sets the value of the attachment's `SecondaryAxis`.

Inherited from Instance

Name	Type / Returns	Description
Instance:AddTag	()	Applies a tag to the instance.
Instance:children	Instances	Returns an array of the object's children.
Instance:ClearAllChildren	()	This method destroys all of an instance's children.
Instance:Clone	Instance	Create a copy of an instance and all its descendants, ignoring instances that are not `Archivable`.
Instance:clone	Instance
Instance:Destroy	()	Sets the `Instance.Parent` property to `nil`, locks the `Instance.Parent` property, disconnects all connections, and calls `Destroy()` on all children.
Instance:destroy	()
Instance:FindFirstAncestor	Instance?	Returns the first ancestor of the `Instance` whose `Instance.Name` is equal to the given name.
Instance:FindFirstAncestorOfClass	Instance?	Returns the first ancestor of the `Instance` whose `Object.ClassName` is equal to the given className.
Instance:FindFirstAncestorWhichIsA	Instance?	Returns the first ancestor of the `Instance` for whom `Object:IsA()` returns true for the given className.
Instance:FindFirstChild	Instance?	Returns the first child of the `Instance` found with the given name.
Instance:findFirstChild	Instance
Instance:FindFirstChildOfClass	Instance?	Returns the first child of the `Instance` whose `ClassName` is equal to the given class name.
Instance:FindFirstChildWhichIsA	Instance?	Returns the first child of the `Instance` for whom `Object:IsA()` returns true for the given className.
Instance:FindFirstDescendant	Instance?	Returns the first descendant found with the given `Instance.Name`.
Instance:GetActor	Actor?	Returns the `Actor` associated with the Instance, if any.
Instance:GetAttribute	Variant	Returns the value which has been assigned to the given attribute name.
Instance:GetAttributeChangedSignal	RBXScriptSignal	Returns an event that fires when the given attribute changes.
Instance:GetAttributes	Dictionary	Returns a dictionary of the instance's attributes.
Instance:GetChildren	Instances	Returns an array containing all of the instance's children.
Instance:getChildren	Instances
Instance:GetDebugId	string	Returns a coded string of the debug ID used internally by Roblox.
Instance:GetDescendants	Instances	Returns an array containing all of the descendants of the instance.
Instance:GetFullName	string	Returns a string describing the instance's ancestry.
Instance:GetStyled	Variant	Returns the styled or explicitly modified value of the specified property, or else the default property value if it hasn't been styled/modified.
Instance:GetStyledPropertyChangedSignal	RBXScriptSignal	Returns an event that fires when the given style property changes on the instance.
Instance:GetTags	Array	Gets an array of all tags applied to the instance.
Instance:HasTag	boolean	Check whether the instance has a given tag.
Instance:IsAncestorOf	boolean	Returns true if an `Instance` is an ancestor of the given descendant.
Instance:IsDescendantOf	boolean	Returns `true` if an `Instance` is a descendant of the given ancestor.
Instance:isDescendantOf	boolean
Instance:IsPropertyModified	boolean	Returns `true` if the value stored in the specified property is not equal to the code-instantiated default.
Instance:QueryDescendants	Instances	Returns an array containing all descendants of the instance that match the `selector` string.
Instance:Remove	()	Sets the object's `Parent` to `nil`, and does the same for all its descendants.
Instance:remove	()
Instance:RemoveTag	()	Removes a tag from the instance.
Instance:ResetPropertyToDefault	()	Resets a property to its default value.
Instance:SetAttribute	()	Sets the attribute with the given name to the given value.
Instance:WaitForChild	Instance	Returns the child of the `Instance` with the given name. If the child does not exist, it will yield the current thread until it does.

Inherited from Object

Name	Type / Returns	Description
Object:GetPropertyChangedSignal	RBXScriptSignal	Get an event that fires when a given property of the object changes.
Object:IsA	boolean	Returns true if an object's class matches or inherits from a given class.
Object:isA	boolean

Events

Inherited from Instance

Name	Type / Returns	Description
Instance.AncestryChanged		Fires when the `Instance.Parent` property of this object or one of its ancestors is changed.
Instance.AttributeChanged		Fires whenever an attribute is changed on the `Instance`.
Instance.ChildAdded		Fires after an object is parented to this `Instance`.
Instance.childAdded
Instance.ChildRemoved		Fires after a child is removed from this `Instance`.
Instance.DescendantAdded		Fires after a descendant is added to the `Instance`.
Instance.DescendantRemoving		Fires immediately before a descendant of the `Instance` is removed.
Instance.Destroying		Fires immediately before (or is deferred until after) the instance is destroyed via `Instance:Destroy()`.
Instance.StyledPropertiesChanged		Fires whenever any style property is changed on the instance, including when a property is set to `nil`.

Inherited from Object

Name	Type / Returns	Description
Object.Changed		Fires immediately after a property of the object changes, with some limitations.