Many graphics programs available now are designed to work with photograph as well as artwork . They have all of the standard abilities of a traditional darkroom . They can adjust color balance contrast brightness , saturation and sharpness. In addition special effects such as embossing warping texturing and posterizing are available to make more eye catching images . Movies : movies are not yet in widespread usr on the web ,but their use is increasing and they do . A movie file is assembled from a series of graphics files that show incremental change , the video capture system is an excellent source of these . While the standards are still in flux , the mpeg type of movie file .is a good choice because it is widely supported. One challenge in working with movies is keeping the file size down. A 5 second movie with an image size of only 260*120 pixels can easily add up to a 100k file.