rice dumpling 3d model

Create a clean, watertight 3D model of a traditional Indonesian kue Nagasari, designed specifically for 3D printing. The model should depict a rectangular rice flour cake wrapped in folded banana leaf. Show the characteristic shape: soft rectangular block with gently rounded edges, partially opened banana leaf exposing the white steamed cake inside. In the center, include the banana filling modeled as a cylindrical or oval core with visible layered texture. The banana leaf wrapping should be stylized as smooth folded planes with subtle ridges, not overly thin, to ensure printability. The model must be manifold, solid geometry, no holes, no non-manifold edges, optimized for FDM printing with minimal overhangs. Avoid photorealistic texture; focus on clean simplified forms that still clearly resemble Nagasari. Produce STL-ready topology with clean surfaces suitable for manufacturing.