Valuable works of this painter and sculptor are mostly kept in Italy, America and Iran. After returning to Tehran, Mohassas continued his work in the painting workshop and joined the artistic-literary association Khoros Jangi. This association, which was founded by the efforts of Ziapour, was intended to introduce new art and confront the cumbersome traditions in art and poetry. People like Sohrab Sepehri, Nima Yoshij, Houshang Irani and Gholamhossein Gharib were among the other artists who collaborated with this association. Translation of the works of writers such as Luigi Pirandello, Eugene UNESCO and Jean Genet, as well as theater directing, are other specific artistic activities, along with painting and sculpture. He was among the first Iranian painters and artists who learned painting in the western way and mixed it with an eastern perspective. Mahsas was one of the pioneer artists of Iran’s visual arts. He was one of the top 10 painters of Iran, he had a cultural personality and was an expert in painting, sculpture, theater, translation and poetry. In his works, “being headless” or physical conflicts and problems and physical afflictions are seen, and his works include people who have “small heads and fat bodies” and conflicts of the human body are very prominent in his works. In addition, the mythological works and the influences of Mediterranean art in a period of his works are quite evident. Muhass passed away in Rome on August 6, 2009 at the age of 79 due to complications from lung disease.