Luos's Low Poly/Polygonal styled vfx package is fully optimized for performance and works on any device and platform! Switch included!
Easily readable materials, instances, easy to tweak, adjust, and create alternative versions of existing effects.
Youtube video playlist.
Forum Thread.
Small note!
If you use Unreal Engine 4.16 and install this package and at one point decide to update your project to 4.17 or higher be sure to re-download this package as it will contain some (performance) updates related to some new features that where added in 4.17.