Your FBX 3D model’s huge size usually comes from embedded non-essential data (like unused textures, animations, or modeling history) or unoptimized geometry (excessive polygons, high-resolution textures).
- **Leftover creation data**: FBX files retain extra info from the modeling process (e.g., hidden layers, unused vertices) that adds unnecessary bulk without purpose. - **Unneeded high-quality assets**: Including full animation sets or high-res textures you don’t use bloats the file.
To reduce size, strip unused assets, simplify geometry (e.g., decimate polygons), or compress textures before exporting—this removes bloat without losing core model functionality.