RefPro Ultimate is a Blender add-on that displays reference images and videos directly within the 3D Viewport. The overlay renders on top of the 3D geometry while remaining positioned underneath the software's UI elements, ensuring tools and menus remain accessible without external floating windows.

The tool supports MP4 and MOV video formats, syncing video playback and audio directly to the Blender timeline for animation reference. Users can manipulate references using Blender's native transform hotkeys for grabbing, scaling, and rotating. Additional features include an adjustable opacity setting for modeling through references, a horizontal flip function for symmetry checks, and a locking mechanism to prevent accidental selections during sculpting or modeling.