body: This is the situation: I have a booklet that contains sketches (2D drawings) of human teeth. I would like to use them as reference materials to build 3D models (using blender) and publish the models on Sketchfab and a mobile App.
  
  
  I'm not sure about it since I see people, for example, making car models and selling it on Sketchfab, for branded cars, like Mercedes or Corvette etc... Did they need permission to make this work from the original designers?
  
  
  What are my legal responsibilities in this aspect? Is this considered a copyright infringement?
  
  
  Thanks in advance for the advice.
  
  
  
title: Will I need permission from the work owner of a 2D sketch to make it a 3D model?