Here is my futuristic emergency backup generator design.
Textures: Normal maps for GLSL and DirectX, color, metalness, roughness, displacement, ambient occlusion and curvature map.
All textures in 8192 x 8192 pixel resulution. Created in 3d-Coat.
Also the download contains file for blender cycles rendering, a unreal 4 and unity 5 project and the 3d-coat file and the standard 3d exchange formats fbx, obj etc.
Test in UDK: https://www.youtube.com/watch?v=QJJpCqhbcKE
Test in Unity: https://www.youtube.com/watch?v=Z5QPEdVCfh8
Free Download for non-commercial use :)
https://www.cgtrader.com/free-3d-models/electronics/other/sci-fi-emergency-backup-generator-free-download
STL (Stereolithography, filesize: 382 KB), OBJ (OBJ, filesize: 844 KB), TEXTURES (Textures, filesize: 257 MB), OTHER (Other, filesize: 616 KB), LWO (Lightwave, filesize: 534 KB), DAE (Collada, filesize: 353 KB), 3B (3D Coat, filesize: 97.3 MB), UASSET (UnrealEngine, filesize: 211 MB), BLEND (Blender, filesize: 1.95 MB), UNITYPACKAGE (Unity 3D, filesize: 175 MB), FBX (Autodesk FBX, filesize: 1.64 MB)