Wide-angle isometric 3D illustration of a Turtlefolk capital city on the moss hill. The buildings are medium-scaled and centered within a vast, dark blue swamp that stretches seamlessly to all four edges. Roofs are made of a giant blue turtle shells. City is surrounded by city walls made of turtle shells and sharp wooden spikes. No isolated tiles or white margins; the swamp fills the entire frame. Gritty dark fantasy style, ink stippling, watercolor washes, sharp edges. Warm torchlight vs cool swamp mist. 8k, Unreal Engine 5 finish.