Parshurama, is generally listed as the 6th of the famous ten incarnations (descensions/avatara) of god Vishnu.
Parshurama is an ardent devotee of god Shiva and his student too. So it logically makes sense, he would generally wear a Tripuṇḍra Tilaka on his forehead.
However, as is generally the case with most iconographic depictions of Vishnu's different avataras, they are depicted as wearing the Vaishnava Urdhvapuṇḍraka Tilaka.
In a standard Google image-search one may find, Parshurama wearing both, sometimes Tripuṇḍra, other times Urdhvapuṇḍraka, and sometimes some other kinds of Tilakas too.
In any case, I'd like direct textual references as to what Tilaka do Parshurama wears? Is it Tripuṇḍra, or Urdhvapuṇḍra?
How should he be portrayed in the murtis (idols), or images/paintings, as per the relevant texts?
Consider providing either direct verses from Purāṇas or Aagamas, or any text that depict the iconography or depiction of god Parshurama.