The same stuff but a bit smaller and smoother:
PS. I think it worths adding a bitcoin address in case someone would like to donate to reward this work:
PS#2. I suck at licensing stuffs but I'd like to allow people to use it without too many restrictions.
I guess all I have to do is to say that I've made this with blender, ImageMagick, Gimp and the bitcoin logo we can see on Wikipedia.
I publish this under the terms of the Attribution 3.0 Unported
creative commons license.
I hope it's fine.