Raster instead of vector

[inferrna]

Trying to produce this SVG from provided asymptote script https://commons.wikimedia.org/wiki/File:Gravity_well_plot.svg

With asy -k hole.asy I got this hole_.dvi in attachment. But dvisvgm -ohole_.svg hole_.dvi produces raster image instead of vector. With -B none it is only lower single line.

hole_.dvi.gz

I'm using version 3.1.1 from Clear Linux bundle.

PS: version 2.13.1 just no image. But somehow the original image was created.
Also posted on forum https://sourceforge.net/p/asymptote/discussion/409349/thread/5e624e4710/

[inferrna]

Resolved here
https://sourceforge.net/p/asymptote/discussion/409349/thread/7c4bfbaf0e/#a786

(Use an experimental facility using -render=0 or settings.render=0 Luke)