A Study of Geometry, Light, and Optimality features a trio of fundamental geometric forms - a square, circle, and triangle - overlapping and interacting through RGB additive blending. At their intersections, secondary colours emerge, or as white where all three combine. Infused with my optimal circle packing algorithm, each shape is filled with circles, then rendered as toruses and spheres in metallic 3D. The resulting artwork offers a harmonious interplay of shape, colour, and light.