GreyScaleGorilla - Surface Imperfections: Stains

https://greyscalegorilla.com/product/surface-imperfections-stains/

When’s the last time you saw pristine glass? No splotches, streaks, or spots. Perfect glass is like a unicorn. Does it even exist? Now, imagine a render with glass so perfect it looks fake. With Stains you can add major (or minor) markings to your materials and step up the realism. There are 50 high-resolution texture maps available offering a variety of looks. Add just a few drops for subtle detail or go for full coverage that will make you want to squeegee immediately. Think dried water drips. A splotched mirror. Hardwater-stained faucets. Add Stains to glass, metal, wood, and more for high-quality authentic renders.