Hi,
Commenting post 126: Hi, The 2D is made with Draftsight (Autocad clone), the 3D is made with blender... Basically on that image, it's all matter of using different solid hatches, and putting them front or back one to another. I have a pdf example of another project here, if you want to have a closer look: http://yorik.uncreated.net/archive/projects/marlene.pdf