This material consists of three layers: water, foam and bubbles. You have to duplicate your surface twice and place them inside each other. You will end up with 3 surfaces (the original and 2 copies). Assign water material to one surface, foam material to another, and bubble material to the last one. The material is fully procedural, without any textures, and made only with procedural maps. The materials library has 3 versions of materials with varying foam densities - low, medium and high. The materials library also has 2 versions of materials for different scene units - millimeters and centimeters. Pick the material that matches your scene units. If you don't, the foam will have the wrong scale and look different from the preview. The material uses Displace, so its appearance on the object depends on the object's geometry. The material is resource-intensive - it can take a long time to render on slow computers.