I've stumbled upon a nice assets of low poly rocks and I'd like to create a similar effect. The transition between faces for these rocks are very smooth, I wonder if there is a tool/plugin I can use to create a similar effect (image attached).
This 3 modifiers produce similar effect:
We have remesh for create huge amount of square faces, next adding randomness by displace with noize texture, and decimate for creating big irregular faces. You can tune all settings to get different results.
Maybe, instead of creating geometry, try to use texture (as you suggest voronoi):
I use node group from here: Voronoi Cracks Fac?
By standard it will create the result on the next layer and if you use that one it will make things easyer if you enter a empty one for it to use.
Select the fragment and make them to one object.
Enter edit-mode and remove any doubles
Add a displaysment with some randomness