This 3D model was originally created with Sketchup 13 and then converted to all other 3D formats. Native format is .skp 3dsmax scene is 3ds Max 2016 version, rendered with Vray 3.00 I have a small obsession with interference patterns ;) - intresting how popular this was... basicly I made one spiral using my patented rotation technique (I'm pretty sure it's an origional way of doing it).. and then turned it upside-down. and spun it using ctrl rotate.