How to separate meshes that are converged into a single object This is my mesh which has edges that I made with the knife tool to make a brick wall. And I want bricks to have rigid body for each. So I want them to be a separate object. I tried P->By loose parts but it doesn't work. How do I break down the wall into brick pieces(Though the mesh has those grouts in between the bricks and I'm sure I'll be stuck at that part also)?
Let me propose a different approach.
I believe the easiest solution is to recreate it from scratch.


Base bricks with two Array modifiers to make a wall
Apply both modifiers.
Select all > Separate by loose parts