Transparent emissive particle?

Hello, I’m new to Spark and I’ve been using it for a month and a half now but I can’t seem to get my head around this filter, been trying to replicate it for days and have no idea on how to do it. I’d love it if one of you had a hint or something. I know how to make the drawing mechanism but I’m interested in the material, if there’s a lot of code involved in it I’m out haha. Thanks in advance. https://www.youtube.com/shorts/7H4DfG1Zmvk

I think you just need to set the particle lifetime to some large number so it is effectively persistent. Then you can set birthrate using a screen tap switch to control the “drawing” phase.

Other than that, it seems like some transparent particles with some kind of additive blend mode.

You might need to manually include the “device motion” patch to force it to use world space correctly. I’ve had trouble with particle systems not adding that capability automatically.