3D Model: Create A Highly Detailed 3D Model Of A Natural Cave Entrance Carved Into A Rocky Cliffside. The Entrance Should Be Shaped Like An Irregular Arch, Approximately 2 To 2.5 Meters Tall, With Sharp Edges Smoothed Slightly By Erosion. The Surrounding Rock Surface Must Have Realistic Rough Textures, Cracks, And Natural Erosion Patterns. Focus Only On The Cave Mouth Area, Not The Entire Cliff. The Cave Entrance Should Appear Dark And Hollow Inside, Giving Depth. Avoid Vegetation Or Man-made Objects. The Topology Should Be Clean, Optimized For Further Sculpting Or Texturing. Output As A High-resolution 3D Mesh With Realistic Geometry