The client had a real, but very low resolution, black and white scan of fibrotic lung tissue. They needed a large resolution image that they could use for print materials and a trade show booth. So I started with a very basic trace of the holes from the real scan then proceeded to produce a completely new piece of illustration at high resolution. I used my sketch as a base and added many layers of noises, grunge images, and even ocean waves, among other tricks, to create the final, colored image. By creating the new art, we were also able to adjust the areas of large holes and dense tissue to be a perfect, custom fit.