Initially, the scene was blocked out and used placeholders/existing assets. My job was to make it more polish and presentable for demo. I replaced it with new assets and created my own textures. We are using Unity's terrain then painted the height, textures and grass details as billboards/sprites mixed with some mesh grass that animates with the wind zone. I did not created the moon texture, sky box and water textures. I added some simple firefly particles for ambiance.