photorealistic terrain 3d model

Photorealistic 3D terrain of a large flat luxury villa estate landscape, approximately 500 meters by 500 meters in scale, very gentle and subtle natural undulations with micro-variations in elevation no more than 2–4 meters total height difference across the entire area, soft rolling grassy meadows, natural-looking subtle contours and shallow depressions that feel organic and not perfectly planar, realistic ground cover mix of lush green grass, patches of wildflowers, low native shrubs and dry wild grasses, scattered mature trees including oak, olive, pine, cypress and a few palm trees distributed naturally without dense forest feel, occasional small natural boulders and rock outcrops half-buried in the ground for added realism, faint erosion lines and gentle drainage swales that look like they formed over time, manicured but not artificial appearance with some wilder transition zones, subtle retaining walls or low stone borders only where needed for subtle terracing under 1 meter, golden-hour sunset lighting