II have a house model. Its top view looks like the letter “T”. Now I want to split it into two cuboids. I know that the MeshFilter and MeshRender of this model can be achieved through Unity scripts?
This area of graph theory is called Constructive Solid Geometry (CSG) and deals with combining and splitting geometry like this. There are no facilities to do this in Unity, however the ProBuilder package has some basic CSG functionality, but nothing to actually analyze geometry to decide WHAT to cut apart.
You cannot split it, but you can make such a shape out of two distinct cube objects provided by unity3d.