Observe Bone

Describes how you can debug a specified Bone with the Observe Bone node.


The Observe Bone node can be used to give debug transform information about a specified bone.


Below, a bone by the name of b_MF_Hand_L is being observed and debug information is being displayed.




Skeletal Control

Bone to Observe

Name of the bone to observe.

Display Space

Reference frame to display the bone transform in.

Relative to Ref Pose

Whether or not to show the difference from the reference pose.



Input Pins

Component Pose

The incoming pose.

Observe Bone nodes are also affected by the LOD Threshold system introduced in 4.11. You can find the setting for this in the Details Panel for the Observe Bone node.




LOD Threshold

This is the max Level of Detail (LOD) that this node is permitted to run on. For example: if you have LOD Threshold set to 2, it will run until LOD 2, but disable itself once the component's LOD becomes 3.

Welcome to the new Unreal Engine 4 Documentation site!

We're working on lots of new features including a feedback system so you can tell us how we are doing. It's not quite ready for use in the wild yet, so head over to the Documentation Feedback forum to tell us about this page or call out any issues you are encountering in the meantime.

We'll be sure to let you know when the new system is up and running.

Post Feedback