Hello,
I’ve worked on this previously, I have a full list of things I’ve wanted to make but haven’t achieved and so I’m really demolishing this section of the site, but my questions could be someone else’s 
I I want to create a realistic Moss material like the one seen in this picture
I want my material to look as if it had 3D small leaves hanging, unless there’s another way that isn’t too hard on performance ( maybe I should add polygons and texture them on to the mesh but still I can’t achieve something kind of realistic ) I just want my moss to have variation in colors, a really puffy/3D effect… I searched all over the internet and still haven’t seen any tutorials on something like this, if I can’t make something similar to this, all I really need is variation of colors ( lighter greens, darker greens, red-orange-yellow… brown ) but if I can achieve something close to the moss in this image, that would be perfect !
Cheers !