I want to fill proportional circles with a texture/structure like hatching or horizontal lines *inside the circles*, like in the image attached.

[![enter image description here][1]][1]

Can't find a way to do that with QGIS. Currently, I'm creating proportional circles according to a quantitative variable. I want to fill these circles according to a qualitative variable, not using colors but different texture/structure.

Do you know a way?


  [1]: https://i.sstatic.net/dhgJz.png