"Lake" (https://skfb.ly/oAZws) by Michel Donze is licensed under Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/).
"Grand Piano" (https://skfb.ly/6zIyo) by Sam Claydon is licensed under Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/).
"Old Tree" (https://skfb.ly/6TvHn) by gelmi.com.br is licensed under Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/).
Great horned owl by Poly by Google [CC-BY] (https://creativecommons.org/licenses/by/3.0/) via Poly Pizza (https://poly.pizza/m/fNkq9CwSG6d)


Clouds: https://resourceboy.com/textures/cloud-textures/
Grass texture: https://ambientcg.com/view?id=Grass004
Grass billboards: https://www.reinerstilesets.de/new-textures-billboard-grass/
Moon image: https://pixabay.com/illustrations/moon-planet-space-astronomy-1303512/
Stars: https://pixabay.com/photos/stars-space-night-cosmos-black-964022/