At work we have about 8 conference rooms, all named after scientists. They decided each room should have custom artwork, so the design team was tasked with creating it. I was the only non-design-team member asked to provide art, and I got to do something for Isaac Newton.
This was done at 11x17 as a sort of movie poster, all painted in Photoshop. I also did a smaller landscape version which will be used as a background for the Android tablets mounted outside each room.
Reference photo of me sitting beneath a tree in our front yard.
Rough, blue line sketch
Tighter pencil sketch.
Printed, framed and hung in its new home.