hi, for the pb logos, i used Vector Magic to transform the logos (.png) image into a vector image (.dxf). then i imported these into Archicad (but you can use any cad software like Autocad) and extruded the vector logos to create them as 3D objects. the next step, is to set a 3D perspective that you like to see the objects, and save that view in two modes: wireframe and only visible lines. now we have two vector images, we just need to set the color and thickness to the lines (wireframe line and visible line) and overlap like layers. Finally i export the result into a .pdf file and edit it in Photoshop. Instead for the crankset, i used an already built free 3D object taken from the free 3d web gallery of Google SketchUp. Exported it in a .3ds object and imported into Archicad, repeating the same procedure described above. Hope i was helpful and clear...and that you enjoy my work!! sorry for my bad english....bye

 man, you have some great skills! thanks for the tutorial lol and your English is better than mine nice work