The membranes are made from the outside walls of spacetime, you might call it the curve of the mass, and it includes the energy flow of Gravity. Most of my matter has walls that carry it. The strangest example of this is the sun. You look at the sun, and you see all of the circulating energy flow. From that flow you get Neutrinos.
The white glow of the sun creates a bubble which is the suns membrane. It is made by magnetic forces, and spacetime. The point at which an object ends is beyond its own boundaries. It is a collision from outside.
Our own skin is a collision from outside of us.
But why would I create an outside separate from an inside?
Because my theory is complementary. Each object requires a complimentary force to move around. Each complimentary force must be contained within a tight boundary other wise the force leaks away with entropy.
The Higgs Boson is a good example. take away its boundaries and it is totally unstable.
The sun has a boundary around a hole. The hole is supporting the boundary with an outflow of Neutrinos.
A two way push theory works better than pull, pull.
My magnetism also pushes out.
To think of magnetism as a push out, and not a pull in just requires making the push out a particle which does not push out mass. It pushes out negative mass.