Here is 3d model of German manned torpedo neger was created from parts and named by objects and textures materials. Within a nice scene with good lighting it's easy to get pretty realistic results with this.
OBJ (OBJ, filesize: 479 KB), 3DS (3D Studio, filesize: 115 KB), C4D (Cinema 4D, filesize: 158 KB), FBX (Autodesk FBX, filesize: 334 KB), MA (Autodesk Maya, filesize: 318 KB), MAX (Autodesk 3ds Max, filesize: 401 KB)