This blender 2.91+ addon turns armatures into grease pencil animations.
Go to Edit -> Preferences -> Add-ons -> Install...
and select the python file.
- Select an armature in the 3D viewport
- Call
Project to Grease Pencil
from theObject
menu - Select the projection method
On 3D projection, grease pencil strokes will be added for every bone in 3D space.
On 2D projection, bones will be projected onto a plane perpendicular to the viewport.