I spent most of the weekend writing a super-detailed tutorial on how to create a map using hachures in QGIS. The hachures are created using SRTM elevation data,

I spent most of the weekend writing a super-detailed tutorial on how to create a map using hachures in QGIS. The hachures are created using SRTM elevation data, geometry generators, and there is also a section on how to style them dynamically using the new interpolated lines feature in QGIS 3.20. Do let me know if you find it useful and want to see more like this as it took a lot of time and energy to create — it'll help me justify spending time to create more.