The Tweak kit includes 10 presets that effect individual aspects of your images: tone curve, grain, and vignette. They can be used as stand alone presets, or applied after you have applied a retro kit filter if you need a little more adjustment based on your image. For example, I typically apply the Retro Normal Filter preset from the Retro Kit, and then the Low Fade Tone Curve preset, from this kit, as a way to draw shadows but maintain that retro feel.