To optimize a prefab 3D model without Blender, use tools like Unity’s Prefab Mode, Autodesk Maya LT, or Meshmixer—focus on reducing polygons, simplifying textures, and removing unused elements.
Key steps include using mesh simplification to cut excess vertices, resizing high-res textures (e.g., 4K to 1K), and deleting unused scripts/animations—these lower file size and improve performance.
Unity works best for game dev (prefabs are common there), Meshmixer for quick edits, and Maya LT for detailed adjustments.
In Unity, use the “Optimize Mesh” option in Model Import Settings—this fast, in-engine tool skips extra software.