Human: Generate for a gloomy scene outside a cave with boulders, fallen granite, and pebbles. Assistant: 
The walls are barely shoulder-width here, closing out all but a narrow strip of sky above. Shattered slabs of fallen granite clog most of the path and stray breezes bring showers of tiny pebbles and stone dust from above. The faint light makes maneuvering difficult as the fallen boulders appear no more than vague shadows within the gloom.