Some old modular design assets. Those were done around 2014 to test the workflow of creating an environment with a minimal number of materials. The industrial/sewer environment uses only one trim sheet material. It was created with the workflow from Tor Frick's fantastic Eat3D Unreal and Modo masterclass in mind. All the screenshots and setups were done in Unity 5 Pro, though.
The rocks and rock textures were a mixture between ZBrush sculpting and photo textures. The trees were created with the Tree designer in Unity.