The Moss/Damage Generator is a geometry nodes-based system that is able to add moss models, textures and displacement to all your models. The system is easy to use and gives full control of the model at hand. 

The Textures are optimized for Eevee but can be easily changed within the shader editor (the system only uses one material), the normal vector-based moss material works within Eevee and Cycles.

The Displacement can be heavy depending on the hardware used but can be optimized using a built-in Subdivision system to get more/less detail. 

The Noise-Based displacement as well as the scattering system for moss are dependent on correct scaling but can be fixed by either applying scaling or by working with the given parameters.

please be aware that this product is still being worked on and is really easy to get heavy on RAM if used on incorrectly formated models.

Happy Blending ;)