Basic 3D terrain with dunes randomly generated, you can walk arround.
You need processing to run it (https://processing.org/). This is a language based on Java with core functions to manipulate a 3D environment. Just open worl.pde with processing and type the run button.
You can control the camera with the mouse. Use ZQSD to move. Quit with escape key.
You're free to copy and use this code the way you want. Images origin is doubtful.
Emmanuel aka Exifers