А node that dynamically copies or overrides the 3D transform of a bone in its parent [Skeleton3D]. This node selects a bone in a [Skeleton3D] and attaches to it. This means that the [BoneAttachment3D] node will either dynamically copy or override the 3D transform of the selected bone. Returns the parent or external [Skeleton3D] node if it exists, otherwise returns [code]null[/code]. A function that is called automatically when the [Skeleton3D] is updated. This function is where the [BoneAttachment3D] node updates its position so it is correctly bound when it is [i]not[/i] set to override the bone pose. The index of the attached bone. The name of the attached bone. The [NodePath] to the external [Skeleton3D] node. Whether the [BoneAttachment3D] node will override the bone pose of the bone it is attached to. When set to [code]true[/code], the [BoneAttachment3D] node can change the pose of the bone. When set to [code]false[/code], the [BoneAttachment3D] will always be set to the bone's transform. [b]Note:[/b] This override performs interruptively in the skeleton update process using signals due to the old design. It may cause unintended behavior when used at the same time with [SkeletonModifier3D]. Whether the [BoneAttachment3D] node will use an external [Skeleton3D] node rather than attempting to use its parent node as the [Skeleton3D]. When set to [code]true[/code], the [BoneAttachment3D] node will use the external [Skeleton3D] node set in [member external_skeleton].