its a texture pack that makes grass and dirt reflective with shaders
i recomend "reflective vanilla shaders" for this!
how it works : in the textures, there are the textures for dirt and grass butthey have an "_s" at the end, shaders with "ssr screen space reflections" flips the thing that its on the top of the grass or dirt, making a reflection effect, the texture is with a green like solid color to make a reflection, the shader use that texture for idk but its required to make the effect!
shader link : https://modrinth.com/shader/reflective-vanilla-shaders