Lava Tube Beneath a Basalt Skylight

Draw a landscape section through a basalt lava tube whose roof has partially collapsed into a skylight. Show the thin surface crust, rubble at the opening, and the continuous passage below without turning it into a cavern of impossible scale. Use rock textures and lighting to distinguish the entrance, shaded interior, and still-intact roof.

Paste this into your image generator and adjust details for the result you want. Different models may interpret the same prompt differently.