Tree bark mulch.
4 options.
Select the mulch fraction after the fact.

High quality material and textures. Detailed enough for close-up rendering. Mulch made with texture without geometry.

The archive contains:
.max_2014_VRay_3.60.03
.max_2014_Corona_2
.OBJ
.FBX
.jpg – 16 textures (diffuse reflection (Specular) roughnes (Glossines) normal displacement). Texture resolution 8192×8192 pixels. Seamless texture.

All textures and materials are included and displayed in every format.
Materials are logically named for ease of scene management.

Pre-rendered using Corona.
The stage lighting is not included in the model.
The model does not include backgrounds or scenes used in previews.

who works in V-Ray versions lower than 3.1 be careful in the materials in the BRDF section there is Microfaset GTR (GGX) if your version is older than 3.1 then the BRDF field will be empty. Choose Blinn Phong or Ward – which is preferable for you