Is this cell intended for the thumbnail image? And by side-effect also look nice to break up the appendix?

Hi Visnu, I'm not sure what you mean — can you elaborate? This image is a thin 2000x60px image, intended to mark the end of the main content section. The thumbnail is a separate image that I edited to touch up the colors and be precisely the right size (the rest of the images here are direct outputs from code).

Ah! As a break, it's a nice touch. I thought maybe it was somehow intended or being used to trick the thumbnailer into using it somehow as the thumbnail image.

Really cool images! Love your work!

Thanks!