Some versions of the Purana texts, unlike the Vedic and Upanishadic texts, emphasize Vishnu as supreme and on whom other gods depend. Vishnu, for example, is the source of creator deity Brahma in the Vaishnavism-focussed Purana texts. Vishnu's iconography typically shows Brahma being born in a lotus emerging from his navel, who then is described as creating all the forms in the universe, but not the primordial universe itself. In contrast, the Shiva-focussed Puranas describe Brahma and Vishnu to have been created by Ardhanarishvara, that is half Shiva and half Parvati; or alternatively, Brahma was born from Rudra, or Vishnu, Shiva and Brahma creating each other cyclically in different aeons (kalpa).