This is just a though, right now Indigo saves to a png.
Many proffesional dSLR cameras have a RAW format, which is the image but completly unprocessed. You could then take this image into say photoshop and then edit it, and even change white balance and shutter speed, things like that. What if indigo were to have its own "raw" file that we could then change shutter speed and few others after render time?
