Thank you for your guidance, I used the Recorder plug-in, but it seems there is no way to export particles, the image will be completely transparent
Viewing post in 2D Sword Slash VFX - Unity Prefabs comments
Hello, sorry for getting back to this so late! I did find a small issue with the shader that prevented it from being showing up on transparent backgrounds.
This is now fixed. The Recorder plug-in method should work with all vfx now.
(Changing some materials to the basic shader instead of additive, may give more desirable results)
Just download the new version.
Sorry again for any inconveniences!