These 3 Lightroom presets are designed to give you an easy way to add realistic-looking grain to your digital photos so you can have fun with your film simulation without switching to Photoshop or other software.The All in one grain Lightroom preset comes in 3 flavors: 400, 800, and 1600 named after the iso values of film so you will have a rough idea of what to expect even before clicking on them. No matter if you want a subtle grain or one where the particles are clearly visible there is an option that will help you achieve the look you are looking for. They do this by applying 3 targeted masks to your image with specific grain values based on luminosity. The presets are also designed to add a bit of bloom to the highlights and generally take the edge off the digital sharpness our modern camera usually produces.