Linear perspective has long been at the foundation of most graphics systems. While it has proven to be effective for many applications, it offers limited creative control over the projection of a scene. Nonlinear projections allow for greater flexibility, but existing approaches do not adapt well to the interactive manipulation necessary for creative exploration. This thesis presents techniques for creating interactive nonlinear projections of complex scene geometry. A general nonlinear projection pipeline is presented that incorporates detailed control of projection, composition, illumination, and shadows. A high-level approach to creating nonlinear projections is then developed that builds upon this pipeline. This approach allows for direct specification of a nonlinear projection relative to an initial linear perspective view via the manipulation of feature proxies in the image plane. Additionally, procedural models of nonlinear projection are explored, including a hierarchal model and models that can respond to information such as object annotations, camera motion, and scene motion.