https://shahriyarshahrabi.medium.com/making-a-3d-model-out-of-a-watercolor-painting-6800821b6ee5
Making a 3D model out of a watercolor painting
A short walk through of a little hack on how to convert a portrait painting or a drawing to a 3D model with little texturing or the usual hassles such as proper unwrap. For this I am using Blender, although you could use any software. As the base I am using this painting by Ninoriel. You can view the model on my Sketchfab.