Symbols of radiation. 3d model symbols of radiation. The file is created in Blender 2.79 and can be opened in any compatible packages. Archive includes files with the extensions .blend, .3ds, .fbx, .ply, .x3d, .obj. Render Blender 2.79 default. Polygons:25,536 Vertices:25,432 Using: Open the file by double clicking the left mouse button. Thanks to all.