It's fun yet challenging going into volumes and VDB, as the title says it was created using volume trails poly wire was added later with a variant thickness along the path (I used for each loop to create an attribute for each trail). After that I converted the mesh into a VDB to merge those trails into one blended mesh, but please pay attention not to use isoOffset it's damn slow and single threaded. This scene contains around 4.5 million particles and one of the things I admired is the ability to render both points and mesh together unlike the other method when using Krakatoa.
Download here.