In the Vedas
Vishwakarma is visualized as Ultimate reality (later developed as Brahman) in the Rig Veda, from whose navel all visible things Hiranyagarbha emanate. The same imagery is seen in Yajurveda purusha sukta, in which the divine smith Tvastar emerging from Vishwakarma. In the later puranic period this concept paved the way to the imagery of Padmanabha and Sadasiva.In the Vedic period the term first appeared as an epithet of Indra, Surya, and Agni. In that time the later developed creator concept of Brahma might have been intertwined with the concept of Vastospati and B?haspati, or Brahmanaspathi In the last phase of vedic period and during the growth of monotheism, this realistic God concept becoming more abstract and one can see Vishwakarma [the invisible creative power] emerged as the supreme god who was perceived as a hotar, the unborn creator and name giver of all other gods who have lot of faces, eyes and feet on every side and who helps Tvashtar,[the visible creative power of viswakarma] in producing all the Heavenly, Earthly and other Celestial realms and preserves them through the exercise of his arms and wings.
He sacrificed himself to himself for the evolution of this visible world, thus he is Purusha or Narayana His attributes like Vachaspathy connect him with Brahaspathi (the Guru of Gods). Again, Yajurveda pictured him as the Prajapati and in the Atharva veda he is mentioned as Pashupati. Shwethashwatharopanishad described him as Rudrasiva, the one who is dwelling in all living forms.Later in the post vedic and brahmanic period, the term Vishwakarma is appeared both as the Rsi and the Silpi. In yajurveda the term is seen as one of names of pancha risis. Though the term is an epithet of suryanarayana, one of the seven rays of Surya is also known as Viswakarma. Bhuvana Vishwakarma (Atharva/Angirasa Gothra) is a vedic Rsi who was the author of Rg 10 81,82 suktha, (Prabasa Vishwakarma) was probably a silpi and the son of Prabhas, the eighth hermit of the legendary Astam vasu and Yogasiddha, sister of Brihaspati. He is said to have revealed the Sthapatya Veda / Vastu Shastra or fourth Upa veda, and presides over the sixty four mechanical arts.