Commission for Animancer's 5e DND dungeon-based adventure - Vaz'Kin'Rai. The adventure should be published soon so keep an eye out at: https://animancer.com/

"A large door stands at the far end of this corridor, bearing the same hexagonal slot as the complex’s entrance and its surface
depicting a great tree. The walls and ceiling of the corridor are transparent, a night sky filled with stars and nebulae visible through them. From the walls and ceiling extend a number of shafts of pale starlight that criss-cross the corridor."