Digital effects processes have replaced the traditional film optical effects. With their faster, more accurate interactive workflow, digital effects are widely used, typically in drama productions for movies and for television. With many effects being completed within the of the main post production workflow, it is only the more complex shots that are completed at separate workstations.
Digital effects can retain the full original image quality irrespective of the number of layers used, provided that the images remain in an uncompressed format. The results can usually be seen immediately, making the process interactive and so allowing quick refinements to complete the desired result. All this is available to be seen in context with the rest of the production, providing immediate checks for continuity. As digital effects are relatively quick and accessible, they now play a much larger role in productions.