Always passionate for photography, painting and cinema, before beginning his professional career, he practiced photography shooting stage actors and dancers in his hometown Cagliari - Sardinia - Italy. After his high-school degree in languages and one year at university in political science, he studied photography at the IED (istituto europeo di design). In 1996 Walter started travelling and assisting various photographers in Paris and New York.
His career as a photographer started in Paris with the assignment for a photo-shooting with french actor Vincent Cassel.
Photographs of Walter have been published in Italy, France, Brasil, UK, Spain and Japan in the international editions of magazines such as Vogue, Elle, Numéro, Stiletto and Marie Claire.