https://i.ytimg.com/vi/Y1qDrWt-3J4/hqdefault.jpg Blender is an open source software; this tutorial shows how to add and set-up a reference image, prepare a mesh for modeling a character. VscorpianC Reference Image at – http://www.the-blueprints.com Blender 3d Modeling and Animation program is free to download and use because it is open source software. source