Michelangelo’s paintings are renowned for their realism due to several key factors:

1. **Mastery of Anatomy**: Michelangelo had an exceptional understanding of human anatomy. He studied cadavers to learn how muscles, bones, and skin worked, which allowed him to depict the human body with unparalleled accuracy and detail. This anatomical knowledge is evident in the dynamic poses and lifelike details of his figures.

2. **Use of Light and Shadow (Chiaroscuro)**: Michelangelo employed chiaroscuro, the use of strong contrasts between light and dark, to give depth and volume to his figures. This technique helped create a three-dimensional effect on a flat surface, making his paintings appear more realistic.

3. **Perspective and Foreshortening**: He was skilled in using perspective and foreshortening to create the illusion of depth and space. This allowed him to portray scenes in a way that made viewers feel as if they were part of the scene, enhancing the realism.

4. **Attention to Detail**: Michelangelo paid great attention to small details, from the texture of skin to the expressions on his subjects’ faces. This meticulous attention to detail added to the lifelike quality of his work.

5. **Emotional Depth**: His ability to convey complex emotions through facial expressions and body language made his figures more relatable and realistic. Viewers could see and feel the emotions of the characters, making the scenes more vivid and compelling.

6. **Innovative Techniques**: Michelangelo was innovative in his techniques, often pushing the boundaries of traditional methods. He experimented with different approaches to composition, form, and technique, which contributed to the unique realism of his paintings.

7. **Influence of Sculpture**: Michelangelo was also a master sculptor, and his experience in sculpting translated into his painting. The sculptural quality of his painted figures, with their solid and tangible appearance, added to the realism.

8. **Observation of Nature**: He was a keen observer of the natural world, and he incorporated these observations into his art. His depiction of landscapes, animals, and other elements of nature were rendered with a high degree of realism, contributing to the overall lifelike quality of his paintings.

These elements combined to make Michelangelo’s paintings some of the most realistic and enduring works of art in history.