can you explain this:
“In Overlay, anything brighter than 50% grey will lighten the image, and anything darker than 50% grey will darken the image. Pure 50% grey does nothing. Your noise on the 50% grey will effectively lighten and darken your image with the graininess, and might be enough to get you through.”
In overlay mode its not just adding grain but also altering the grade itself – how am i meant to adjust this so that its just grain?