Isidoro is a renowned carver of wooden masks and one of the original woodcarvers of San Martín Tilcajete. He also served as a mentor and facilitator of the work of many artists in his own pueblo since, in 1980, he was offered a role in the government to stimulate the work of artisans in several parts of Mexico. Rather than the many varieties of animal, human and fantasy figures decorated with acrylic paints typical of his fellow artists, Isidoro creates large dramatic masks, animals, skeletons and devils. He has also developed newer designs: virgins, canes and saints that are painted with natural dyes. Isidoro works from his own imagination, often inspired by nightmarish dreams in which he pictures faces with irregular noses and devils. His pieces are quite valuable, and are widely collected. However, at this stage in his life Isidoro is not willing to sell his favorite creations.