3D Model: Generate A Low-poly 3D Tile Of A Desert Biome, Exactly 10x10 Meters. All Horizontal Edges Must Be Flat At Exactly 1 Meter High For Seamless Tiling. Add Smooth Desert Dunes In The Center, But Never Raise Or Alter The Flat Borders. Include A Small Oasis In The Center With A Shallow Pond (0.3m Deep) And A Few Palm Trees Or Desert Plants. Use A Clean Topology With No Non-manifold Geometry, Overlapping UVs, Or Open Edges. Keep Vertex Count Under 5000. Use A Desert Color Palette With Sandy Tones. Place The Pivot At The Base Center (0,0,0). Output A Watertight, Game-ready Mesh For Modular Use In A 3D Engine Like Godot.