A photorealistic, low-poly, 3d model of a Black-Hole (colour changeable) with realistic volumetrics. I've uploaded this model in 4 formats (fbx, obj, stl, blend). I've also edited the compostior for a realistic render.
STL (Stereolithography, filesize: 30.4 MB), OBJ (OBJ, filesize: 27.9 MB), FBX (Autodesk FBX, filesize: 29.2 MB), BLEND (Blender, filesize: 25.5 MB)