The starting point in Leberer's pictorial work is the installation. He uses metal and glass as materials, primarily incorporating light - natural as well as artificial - and increasingly the "appearance" of color. His groups of works are divided into metal pictures, which are attached directly to the wall, and those which, as sculptural objects made of metal and glass, move away from it or stand freely in the room as an installation. Formally connected to the room installation, since 2003 he has increasingly created compositions on metal plates, in which the coloration is more intensely pronounced. Leberer's works actively determine the existing effect of the space - that is, of the architecture. With his objects, Leberer moves in an ambivalent field that transcends the boundaries of the genres of sculpture, painting, and architecture. By uniting these, he achieves a reciprocal interaction. In the simultaneous experience of color and light in the spatial dimension, Leberer makes both his individual and autonomous artistic contribution. Leberer received important impulses for his current pictorial work from Africa, which he visited in 2003/04. This stay stimulated him above all to expand and intensify his color palette. Leberer's works are located in an area between reflection and intuition that is difficult to grasp rationally, which is why, with a few exceptions (e.g. the Africa pictures mentioned above), they consistently elude description or designation by title. A purely rational effect of his works, which he could achieve through a consistent application of a non-objective, constructively and geometrically laid out repertoire of form and color, is countered by the accents of the gestural-linelike elements. In recent times, the rational-concrete reference comes more to the fore.