Cartoon River Flowing Inside an Alien Ship

Inside a sleek alien spaceship, a bright cartoon-style river winds through a glass-walled chamber. Thick black outlines, flat cel shading, and saturated colors give a cheerful 2D look. Neon greens and purples light up the water, reflecting off ripples as the river flows between rounded rocks, bioluminescent plants, and friendly alien fish. The ship’s curved walls are lined with holographic panels and alien glyphs. A starry space outside glows through the transparent hull. The composition is a wide, eye-level shot with the river leading toward a distant viewport, conveying whimsy and depth.