I have recently been getting into some physis simulations with blenders rigid body. I have a basic understanding of cell fracture and rigid body constraints.
Here is what I don't know how to approach: Let's suppose I have a large wall and want to break a comparably small hole into it (for example with some bullet). What I would do is cell fracture the wall, connect the particles with constraints and setting the
breakable threshhold to such a value that only the desired area breaks. However, there are still seams between all the other parts of the wall which are in no way affected by the simulation.
How can I do a simulation in such a way that only the relevant particles are fractured and the rest remains untouched?
What I mean can be seen at about 8:57 in this great video (I didn't make it, just my opinion): The part of the cube that isn't shattered still has fractures which shouldn't be there.