Volumetric sky and clouds, based on papers by Sébastien Hillaire, Andrew Schneider, Antoine Bouthors and Fabian Bauer.
https://www.youtube.com/watch?v=Unyff4dbbeQ
https://nikita.works/testchambers/clouds/
WASD - movement
Q - roll left
E - roll right
R - ascent
F - descent
MOUSE WHEEL - increase or decrease movement speed