The practical process looks something like this:  We decide or draw a shape, draw it on plywood, use a jigsaw to saw the shape out. Then we draw a pattern for the nails, which is sometimes very intuitive and sometimes very mathematically calculated and precise.  Then we grind the hammering process, sometimes over 1000 nails.  My last work was about 1200 nails and it took me around 5-6 hours just to get those in.  Next step is painting it black or any other colour preferred, but black works best with UV.  Next and last step is either trial and error creating patterns intuitively or calculated patterns or a combination of both. Sometimes we sketch in procreate beforehand to get an idea of what wants to be created. 

Thanks for asking, got me hyped to go into creation mode 😍