Here is the high poly version of my emergency backup generator design which I have sculpted in 3d-Coat.
The 3d-Coat original file has over 25 million polygons. For fbx, blend and obj I have reduced the poly count to 8 million and 4 million, still looks like the 25 Million version but the lower poly count makes it easier to work with.
Here you can find the game ready version with pbr textures: https://www.cgtrader.com/3d-models/industrial/machine/emergency-backup-generator
BLEND (Blender, filesize: 337 MB), OBJ (OBJ, filesize: 104 MB), FBX (Autodesk FBX, filesize: 250 MB), 3B (3D Coat, filesize: 97.1 MB)