Overhangs cannot be captured with heightmaps, also it is not possible to sculpt overhangs into Landscape, but check this classic thread for some ideas. (Making holes in landscapes and using meshes, smaller landscape actors that have been rotated)
Overhangs cannot be captured with heightmaps, also it is not possible to sculpt overhangs into Landscape, but check this classic thread for some ideas. (Making holes in landscapes and using meshes, smaller landscape actors that have been rotated)