Why is this passive rigid body allowing objects to pass through it? I have an object falling to the ground and breaking into pieces, but my plane, which is a passive rigid body, allows many pieces to pass through it:





Why is this happening and how can I fix it?
You can add a collision margin on the plane (the passive rigid body).

Also, increasing the number of simulation steps per frame from the rigid body properties panel in Scene properties tab will give you better results.