[1] His father was naturalised as a French subject by letters registered at the cour des comptes of Aix-en-Provence in 1720[2] and died in Aix on 25 December 1745 aged 95.

He was buried the following day in the old parish church of La Madeleine, beside Jean-Baptiste van Loo who had died on 29 September the same year.

In his Dictionnaire des Pastellistes, Neil Jeffarès describes the images created by Vialy as "easily recognizable : not very expressive like those by Allais, they are distinguished by a certain sweetness.

Vialy's pastel technique corresponded to the taste of his time, inheriting his attitudes to 3/4 length portraits from his contemporaries and from Louis Vigée.

In contrast, his canvases adopt poses which owe a clear debt to Rigaud, such as his Portrait of a woman as Hebe (sold in 2007), and other artists.