A 3D Trail Renderer for Godot
Download the repo, and add it to your addons folder.
Add the Trail3D node to your scene and set it up with a width curve and a material. There is a material provided, Trail_Unlit, if you want a simple solution.
This project was forked from Trail3D. The main difference is that this fork uses GDScript instead of C#, to allow for better support on all platforms.