7 Variation of rocks. Sculpt and decimated to low-poly. Each with unique PBS material. Based on hand painted texture. Mixed of common surface for harmonize the material and manual paint to match the shape. The textures are 1024 except the biggest one (a cubical one meant to be use to form up or fill the area) are 2048 for quality.

The files was originally made for Unity. You could just unpack the zip and place it in your asset folder and use the prefab right away.

For other program usages. There're FBX format 3D model with textures in PBR format. Smoothness channel are packed as Metalic's alpha. So there's possibility to extract the channel to grayscale and invert it and use it as Roughness. Normal map are in OpenGL format so if you use it in DirectX format, don't forget to invert green channel for the correct result.