Abstract: An optical instrument for modifying light as a function of selected prisms and anti prisms for generating visible complex geometries. The optical instrument provides a linear arrangement of crystal portions followed by prism portions through which light passes, respectively, before being viewable through an eyepiece. The crystal portions provides a multifaceted crystal prism, a crystal chamber housing a selective arrangement of a plurality of basic crystal polyhedra, and a rotatable transparent sphere. The prism portions provide mirrored and glass surface triangular prisms independently rotatable relative to the longitudinal axis of the optical instrument.