Swap the Guggenheim demo (shadowless) for the author's own photo of a New
Year's Day pickup soccer game at Penn Park, Philadelphia: EXIF GPS
39.9508,-75.1852, heading 85.48, taken 2017-01-01 12:59. The low winter sun
gives the photo long shadows to compare the sphere against, and the day sweep
(07:00-18:00) shows the short January arc, sunrise to below-horizon dusk.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
