Black Cube is so dark and reflective that it is almost invisible. It appears to lack substance, like a shadow. Yet its slightly bulging sides reveal an energy contained within. This sculpture is abstract: rather than telling a story, it represents an idea. In Karel’s drawing of Black Cube, which you see here, the energy inside the sculpture is created by spheres and squares that act like an internal dynamo. This theoretical energy source pushes the walls of the cube outward, creating the bulging sides and the distortion of the reflective surface. Karel uses light, glass, and geometric forms to make illusionistic sculptures that challenge the viewer’s perceptions of space and dimension.