The ideational process gives rise to endless illusions. These illusions may be thought of as the images that occur in a house of mirrors. They are projected on the existence. The fundamental nature of the existent thing is it's emptiness. The myriad gods in Hinduism are an example of such mirroring. The single source of the Brahman has many reflections in the myriad gods of the pantheon. Ideation is the process of producing the illusions as a projection on existent things.
The mechanism for producing the illusions are the four different kinds of Being. They manufacture the illusory continuity that is the screen that the illusions are projected upon. The screen of illusory continuity covers over existence. Existence is what is neither shown nor hidden. Beings are caught up in and given shape in the process of being projected.