My question is simple, I want to know how authors/editors make this kind of figures.
Only TikZ/PGF? Do I need another package that I don't know? Or is it just not possible making this in LaTeX and I require another program instead?
If so, I settle for the name of package/library and I'll take care of reading its manuals.
Answer can be a comment. After this, you can close the question, as you wish.
