To minimalize a flat colors 3D model, prioritize simplifying geometry (via decimation or edge reduction) and limiting the color palette to 2–5 cohesive tones—this preserves the model’s core shape while reducing visual and geometric clutter.
Remove redundant polygons (like small details that don’t affect the overall form) using tools such as Blender’s Decimate modifier to keep geometry lean.
Use solid, untextured materials and a tight color scheme to maintain the flat look. Test each change to ensure the model stays recognizable while achieving a minimal design.