It was not feasible to access the original cover art by Ralph
McQuarrie. There were multiple printing runs of the book, with variable
results, most notably an orange title version with a warm, light
background, and a yellow title version with a cold, dark
background. Comparing a scan of an unread pristine yellow version, and a
scan of Tony’s orange version, it was a tough call to not use the pristine
yellow version, but it did not respond well to color correction. The orange
version required extensive digital retouching, although removing the logo
and price was a joy. If you have a clean copy of the orange version, please
let me know.
The original figures from the book are difficult to read, so rather than
duplicate them, new figures were designed to convey the same information
more clearly. Figure 1 replaces the stick man with circular arrows showing
the direction of rotation, and orients the shaded orb halves to match the
rotation. Figure 2 uses transparent shading and more explicit vector
notation including subscripts for the vector angles. Figure 3 replaces the
point plot with a graph, adds the missing parameters necessary for plotting
the graph, and starts at dawn of the Killer Bannk, instead of at solstice,
so the Killer Bannk is not split in half.