To make a sprites 3D model look efficient, optimize by reducing texture size, simplifying polygon count, and using sprite sheet atlases to cut draw calls.
Smaller textures (e.g., 256x256 instead of 1024x1024) lower memory usage, while fewer polygons (removing hidden faces or using low-poly shapes) ease GPU load. Sprite sheets group multiple sprites into one texture, so the engine renders them in fewer batches—critical for real-time apps like games.
For tools like Unity or Blender, try auto-UV unwrapping for atlases and use compressed texture formats (ASTC, ETC2) to balance quality and performance without extra bloat.