Super fun diagrams. I interned at LLNL at one point and did a little work with some Sankey variants visualizing energy and resource flows in urban environments[1]. I think I still have the code lying around somewhere, I'd love to return to it someday.

People at the lab who were aware of them were uniformly pretty proud of those main energy figures. I had multiple old hands approach me at the poster presentation who were really enamored of the design, one fellow actually said he thought it was the best figure the lab produced. Of course, I was a pretty dumb grad student and wasn't totally sure what I was doing, so mine don't have the polish of the official ones. They were fun to work on though.

[1] https://www.flickr.com/photos/23215983@N02/albums/7215763423...