In the 1990s, Sean Scully's art further evolved and deepened, manifesting his mature style that seamlessly blends abstraction with emotional resonance. This decade was marked by significant developments in his practice, including the expansion of his celebrated "Wall of Light" series and a focus on themes of light, structure, and the profound human capacity for emotional expression. Scully's work in the 1990s continued to move away from the minimalistic rigor of his earlier phases towards a more expressive and textured abstraction. His paintings from this period are characterized by their heavy physicality and use of large-scale stretchers, reflecting a shift towards larger, more complex compositions. Scully experimented with a variety of materials and techniques, incorporating steel and using a checkerboard motif that hinted at his interest in structure and repetition​ (Wikipedia)​. The "Wall of Light" series, initiated in the late 1980s, came to fruition in the 1990s as Scully further explored the interplay of light and structure inspired by his travels to Mexico. These works, featuring blocks of color arranged in horizontal and vertical groupings, showcase Scully's nuanced understanding of light and its capacity to convey emotional depth. The series embodies Scully's interest in the elemental interactions between land, sea, and sky, expressed through abstract compositions that evoke the landscape's physical and emotional landscapes​ (The Metropolitan Museum of Art)​​ (DailyArt Magazine)​. Scully's art of the 1990s is also notable for its exploration of personal and collective narratives, often referencing historical and contemporary art. For example, his paintings are seen as homages to great artists like Matisse, integrating references to nature and the human figure within abstract environments. This period saw Scully delving deeper into the themes of loss and memory, particularly evident in works dedicated to his son, which display a somber, colorless mood reflective of his grief​ (DailyArt Magazine)​. Throughout the 1990s, Sean Scully's work exhibited a continued commitment to abstraction as a means of exploring and expressing the complexities of the human condition. His paintings from this era are marked by their emotional intensity, structural innovation, and the synthesis of personal narrative with universal themes of light, space, and texture. Scully's art from the 1990s stands as a testament to his belief in abstraction's power to promote tolerance and understanding through its capacity to evoke a shared sense of humanity​ (DailyArt Magazine)​.