This was done for the 15challenge, the theme was x-ray.
So, I've started thinking about what would be nice or even interesting to see in a x-ray, that was the hard part. I belive compositions made with x-rays are rare due the fact we are used to think about it only as a way to see broken bones, or detect some other stuff inside our bodies and not as a way to make art.
I've done this piece around 3 hours, using my hand as a reference (you can see de image below). This is the hand position spider-man does when he launches web. The illustration was all done in Adobe Photoshop.