Computer graphics experts do not in general imitate "poor" or "distorted photographs, precisely because these distorted photographs, which make the viewer conscious of the photographic process, are themselves not regarded as realistic or immediate. Thus, photographs and synthetic images achieve the same effect of erasure through different means. The photograph erases the human subject through the mechanics and chemistry of lens and film. So-called digital photography is a hybrid that combines and reconfigures these two kinds of automaticity.

While many techniques exist for evaluating the parameters of an AR model, algorithms for MA and ARMA are less plentiful. In general, these algorithms involve significant computation and are not guaranteed to converge, or may converge to the wrong solution.