"Isometric game-ready view of a weathered rocky mountain formation featuring a large, stone skull integrated into the cliffside. The skull is made of rough, jagged rocks with light moss coverage. Its mouth is open, forming the entrance to a cave. Detailed rocky steps and a natural stone passage lead up to the entrance. Emphasize natural rock textures like in the reference, with an irregular, realistic formation. Use even chiaroscuro lighting, no harsh shadows or overexposed areas. Background should be neutral or textured gray."