Today I bring you a tutorial that can make your characters look like they just came from Minecraft, using Niagara and some simple math to position particles in a grid. Also included a way to transition between the mesh and particle effects, and how toi detach the particles and apply physics to them when done. Enjoy! 
https://dev.epicgames.com/community/learning/tutorials/vv11/unreal-engine-voxelize-skeletal-meshes-using-niagara