Particles To Path - baldingwizard/Blender-Addons GitHub Wiki
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Particles to Path for Blender 2.79
Particles to Path for Blender 2.80
Particles to Path for Blender 2.81
Details
Converts a particle system of the currently selected object into a Nurbs curve, following the particles in numerical sequence. By disabling all forces on the particle system and emitting one particle from a vertex per frame, this can be used to create a 'trail' as detailed in How to add trailing light effect to finger tips