Answer
The two-inch brush, Bob Ross's unusual tool of choice, played a pivotal role in his unique wet-on-wet technique. Unlike typical brushes used for blending and fine details, this broader brush allowed him to swiftly cover large areas with color, creating the foundation for his serene landscapes. Its adaptability made it suitable for applying both broad strokes and delicate foliage, showcasing Ross's mastery and innovation in the art of painting.