Jeff Nimeroff's current work centers around constructing photorealistic animations of naturally illuminated scenes [10][9][27] without the requirement of using a costly renderer on each frame [26][25].
More specifically Nimeroff is using steerable functions [11] to represent natural illumination for use in a ``photorealistic animation via image interpolation'' pipeline. The theory shows the conditions for generating photorealistic basis images and under what constraints these images can be interpolated to generate the scene under any possible natural lighting condition.