I work with QGIS 3.14 and should do an infographic map with pie charts in black and white (grayscales) only. The final result should look something like this.
I tried to use the built in pie chart rendering from layer properties. However, in these pie charts, you can only define a color, but not a pattern fill or similar styling. As I have about 12 different categories, styling them in different shapes of gray makes no sense as the eye can't distinguish the difference between the categories. Each pie, however, has just about 3 or 4 sectors represented (the rest will be styled as "others").
I looked at this workaround, but hope that in the meantime, there is a better solution.
Any idea how I could get a grayscale pie chart?