I used the ColorMix shading app to add sunset shading to the original model of Mt Fuji.

Learn more about Prusa ColorMix in the blog article.
To correctly open the 3MF project file (which includes virtual extruders), make sure to use PrusaSlicer 2.9.6 beta (or newer), which introduced support for color mixing. In older PrusaSlicer versions, the model would instead only use normal extruders.
Printed on PrusaXL using Prusament PLA Galaxy Black and Oh My Gold, at 0.15mm layer height. You could print even at 0.1mm layer height to improve the ColorMix result.
The author remixed this model.
Added MMU painting.