There is a well known Spanish -born artist who lived in Texas for many years; he is Jose Arpa (b. 1868- 1952 ) - so he would have been painting around the 1930s. He was one of San Antonio's best-known painters. Arpa was a brilliant colorist worked in a realist style; and his skill in handling sunlight earned him the nickname "Sunshine Man." If one looks examples of his paintings, many are of trees in bright sunlight. Though I could not find a marketplace scene.
He was also a well known teacher, He taught Texas landscape painter Robert Wood. His assistant and one of his students was Xavier Gonzales. He also taught painting to Octavio Medellín and influenced the work of Porfirio Salinas. (If it isnt' Arpa - perhaps one of these artists - all of whom lived in the USA for longer or shorter periods - is the one you are looking for.
