Procedurally generated 3d terrain with perlin noise.
Additional experiments with 3d terrain hydraulic erosion: showing the path of water that converges into rivers and small lakes.
The small 3D viewer I developed features soft shadows, normal mapping, hdr lighting, bloom, parallax mapping, cubemap skybox and reflections.
Terrain textures from: FreePBR.com
Cubemap from: https://opengameart.org/content/miramar-skybox