Viktor's Mossifier is a fully procedural geometry nodes setup in combination with a moss shader function. When creating it, it was important for me to have something that not only works from a distance, but also from up close, that is why the shader below the spawned meshes is using 4k textures and the meshes itself actually look like tiny moss strands. It is fully customizeable so can change colors, the way it grows and the shape of the meshes, all inside one modifier - Mossifier.
Check it out on Gumroad: https://viktorheidelbach.gumroad.com/l/mossifier
Simply append it to your scene, the geometry node to your object and plug in a shader function into your objects shader.
A small timelaps from import to final rendering.
An in depth overview of the geometry node.