A few years ago heathenX and Richard Querin created a series of tutorial videos for Inkscape, a Free and Open Source vector graphics program that can be downloaded from http://inkscape.org
The original heathenX website no longer exists, however I have obtained a backup of all their tutorial videos and will be uploading them to Youtube over the coming months. All the videos are licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license
(https://creativecommons.org/licenses/.... You are welcome to share and modify them in any way, but if you do so they must remain
under the same license, and must be attributed to Richard Querin and heathenX.
If you are the sort of person who prefers lengthy, written tutorials, rather than a Youtube video, my own series of Inkscape tutorials for Full Circle Magazine can be downloaded for free from https://fullcirclemagazine.org/inksca...
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NOTES: The extension, which still works in Inkscape 0.92.x, can be found at https://github.com/shlomif/Bezier-Env...
If you don't want to install an extension then the same effect can now be achieved with Live Path Effects, but it requires more manual tweaking.
The Effects menu is now called Extensions.
Effects ‣ Render ‣ Grid is now Extensions ‣ Render ‣ Grids ‣ Grid.
Note that there's also Extensions ‣ Render ‣ Wireframe Sphere. It doesn't give exactly the same result, but is worth checking out in case it suits your needs better.