it could be great if SlicerFab have dithering within the algorithm. We were using Gimp with Bimp (the batch mode modification for Gimp, all free and open source software) to change the amount of colours by dithering the images, but still having errors to solve. And I recently post an error, I was using SlicerFab properly until today https://discourse.slicer.org/t/slicerfab-doesnt-work-properly-in-5-0-2/24001