The trickiest moment in this project came when Makerworld put limits on script uploads. Instead of letting the addon stall there, the maker moved it into open source roughly six months ago. The full code now lives on GitHub, and there is a dedicated website alongside it. Half a year on, the project clearly has not slowed down.
TrailPrint3D is a free addon for Blender that has existed for almost two years. Its purpose is to produce 3D printable maps. What stands out to me is the accessibility: the maker describes it as easy to use with no Blender knowledge needed, and using it involves no account, no tracking, and no limits. Stripping out those barriers seems like a smart call for reaching people outside the usual Blender crowd.
The printed results are multi-color quadrilateral tiles that come together into a single square composite map, and the tiles carry a wide range of cartographic rendering styles. That variety is what caught my eye, since one finished map can read like several different atlases at once.
Adoption numbers back all this up: nearly 15000 downloads and a Discord community of over 1000 people. Contributions have arrived from people committing their own code, and one contributor has been actively working on the project for the whole six months since it opened up. The trade-off I see is that distribution now rests on GitHub and the website rather than a big platform, so discovery leans more on word of mouth.