Silent or with minimal sound, Hill's early formalist works explore the manipulation of electronic color and image density through the camera obscura and image processing devices. Of these tapes, Hill has written that "much of the subject matter and the expressionistic method of working underline and in some sense parody the traditional medium of painting." In Windows, the image of windows in a darkened room is digitized, densely layered, and otherwise abstracted in a series of graphic compositions.