This is the region of Atman the Ineffable One, the world of the most crude reality, the dimension of mathematics.
In this three-dimensional world we never perceive solids in an integral and unitotal form. Here we only see in a subjective form: angles, surfaces, etc.
However, within the luminous region of Atman, we not only perceive solids in an integral form, but moreover, we perceive hyper-solids, including the exact quantity of atoms, which in their conjunction constitute the totality of any given body.
This is not intellectual mathematics (ie. 2 + 2). Instead, it is a perceptive mathematics, in which one instantly sees the causal forces at work; one "knows," and knows why. It is intuitive, in a far richer and deeper way than a mere "hunch."