Yes, I have a program which plots vector fields [1], part of CI creates some plots for cases which have previously caused issues [2]. They are not meant to be attractive, rather to exercise those edge cases. Example output here: [3]
[1] http://soliton.vm.bytemark.co.uk/pub/jjg/en/code/vfplot/
[2] https://gitlab.com/jjg/vfplot/-/jobs/5347850554
[3] https://jjg.gitlab.io/-/vfplot/-/jobs/5347850554/artifacts/i...