It seems that a LOT of people here who design card models use software such as Rhino 3D, pepakura, and others, just to name a few, to unwrap 3D designs. I was wondering if there is anyone out there who designs their models the old-fashioned way (rulers, the eye, and the good old brain). Here's my technique if anyone is interested: I use Microsoft Office Publisher to draw. I paste images on there and view in full size. I resize the image until it seems like a reasonable modeling size. After that, I cut the side-view into sections and "unfold" them using the appropriate mathematical formulae and some mental imaging (the ruler comes in handy at this point). By unfolding, I mean I choose/draw the appropriate shape with the appropriate proportions and size based on my mathematical formulae. Once these parts are laid out, the model's good for texturing and eventual building.