Indeed, it was Di Jun, scarred and continuously bleeding into the Chaos, who transformed himself into specks of starlight.
The Spiritual Illusion Realm had started to form the moment Di Jun stepped into Chaos and encountered Taiching Laozi.
The initial appearance of 'Di Jun' was not his true body, but a manifestation congealed within the Spiritual Illusion Realm.
This 'Di Jun' cannot be said to be truly real, nor can it be said to be entirely false.
At Di Jun's current realm, he had complete control over himself and also a profound understanding of himself.
He projected all of this into the Spiritual Illusion Realm, hence the laws that Daoist Tai Ching faced were real, Di Jun's physical strength was real, and the enhancement from the Celestial Heaven Star Formation remained true.
Moreover, the 'Di Jun' within the Spiritual Illusion Realm truly inherited the real Di Jun's thoughts; it was an authentic extension of Di Jun's thinking.