medieval island terrain 3d model

Create a game-ready medieval island terrain for a top-down RTS, approx. 2 km × 2 km. One irregular natural island surrounded by water, with 70–80% playable land. Use broad plains, gentle hills, forests, rocky resource zones, farmland areas and limited northern mountains. Add several large flat pads for future cities, towns, villages and castles. Include wide open battle areas for army formations. Paint a clear medieval dirt-road network directly into the terrain, connecting settlement pads, resource zones and strategic passes. Add one main river with a few natural crossings. Include forest zones for wood, rocky hills for stone/iron, fertile plains for food and open grasslands for livestock. Terrain must be smooth, readable, realistic and easy to navigate. No buildings, castles, bridges, armies, fantasy elements, extreme cliffs, random spikes or dense object clutter. Prioritize gameplay layout, roads, flat areas and strategic geography over decoration.