It would be awesome if it were possible to control the linewidth of the hatch effect, for example in fill_between. It is now only possible to set the linewidth parameter, but that also gives the filled area a border, which can be undesired. Is it possible to allow for a dictionary to be passed to a "hatch_kwargs" parameter, that allows you to set the linewidth, hatch-style and possibly other things?

In this stackoverflow post (http://stackoverflow.com/questions/11452743/manipulating-linewidth-for-hatching-in-matplotlib?rq=1), I found that the hatch linewidth is hardcoded in C++, so it should be relatively easy to make its value depend on some python input, wouldn't it?