Which software do you use to make "publishing quality" illustrations as shown?.
None, because I do not make "publishing quality" illustrations.
I would suggest anything similar to Inkscape, however. This may be of assistance.
Note that I fail to find the 1st picture to be of "publishing quality".
Best of luck.
Thank you, I've found Inkscape also, and works perfectly for this purpose.
It is not specific for that, but any decently documented vector graphics editor should suffice. And there seems to be a plethora of Inkscape tutorials.
Separate names with a comma.