Sketch the cave opening with an irregular, rounded shape
Draw uneven rock edges around the entrance
Add a dark interior shape behind the opening
Outline jagged stone formations along the top and sides
Include cracks and rough lines in the rock
Add a ground line leading into the cave
Draw shadows inside the cave to show depth
Add stalactites hanging from the ceiling if desired
Add small rocks or debris near the entrance
Shade the outer rocks to create texture
Darken the deepest parts of the cave
Refine the outline and erase extra sketch lines