If you're looking to reduce oversaturated plant greens in your ReShade presets, the key is to adjust the color grading settings. Start by tweaking the HueShift or Saturation settings for greens or use a specific color filter to bring them down. You can also adjust the Tonemap or LumaSharpen settings to fine-tune the effect. Download presets designed for realistic color balance, then adjust them according to your environment for more natural results.