Researchers often use 3D Convolutional Neural Networks (CNNs), like the U-Net architecture, to "paint over" or remove these ring-shaped defects in 3D scans.
In the field of 3D imaging and computer vision, "Ring Artifacts" are common errors that researchers use to fix. [3D] Tamaki (Ring) – NekoPoi
Inpainting of Ring Artifacts on Microtomographic Images by 3D CNN like the U-Net architecture
A specific "Deep" rendering style or texture applied to a 3D character like Tamaki. [3D] Tamaki (Ring) – NekoPoi
Which of these interpretations were you looking for, or were you referring to something else entirely?
A "papercraft" or physical 3D ring model made of high-quality "deep" paper stock.