PBR exterior pack: 60 stones and rocks

This package contains 60 unique stones and rocks grouped by type.
Each group has 3 unique textures sets which includes: albedo, normal, metallic and ao maps. All textures have the resolution of 2048.

The 4 groups are:
- Standard stones and rocks;
- Water stones and rocks (smooth ones);
- Sand stones and rocks;
- Rough stones and rocks (have rougher surface).