How's the performance lookin' like
Viewing post in Fire VFX - Godot 3D comments
The particles are mostly 2d billboards in 3d space that use noise textures and some other tricks to fill in the gaps, so there aren't too many particles emitted (and you're of course free to change the amounts).
I also intentionally used Godot's mesh nodes instead of imported ones, because they allow you to change the resolution to your liking.
Since the way transparency is handled in 3d is pretty messy, I'm currently working on implementing different ways to handle it in these shaders (Smooth, Dithered and Alpha scissor) while I'm working on my next pack. I'll also include a tool script in the effects to easily change resolutions and other performance related things. When it releases I'll try to update this pack as soon as possible.