Ever run into the issue where you're looking for reference images at a specific angle and can't quite find what you need? I do, all the time. So I started creating basic 3D head models for my work and now I'm making them available to you as well!
Model can be opened in Sculptris (http://pixologic.com/sculptris/)
Tutorials to get Sculptris files into Blender https://www.youtube.com/watch?v=TnRGG5Jbxyg
(Sculptris is a subset of Zbrush and has built in options to transfer to Zbrush.)
License: To be used AS REFERENCE ONLY in personal and commercial projects. No credit required but is appreciated.
Credit required if: If you are directly using the model to make something of your own, ex: customize the model, 3D print it, etc. Credit is required. Please link back.