https://i.ytimg.com/vi/YUyu50EyjrI/hqdefault.jpg Blender open source software; this tutorial shows step-by-step how to add a reference image or 3d modeling blueprints for modeling. VscorpianC You can find reference images at – “the-blueprints(dot)com” Blender 3d Modeling and Animation program can be downloaded and used freely because it is open source software source