I’ve been a fan of this program for many years. It can make some outstanding “sketches” if you play with the settings. It does take a long time (20-60 seconds is not unusual on my PC: Win 10, i7 6700 @ 3.4GHz, GTX 750 Ti graphics card). I think the wait is not bad for what you can get.
I would like it if SoftOrbits would add a way to select a smaller region of the picture to convert for testing different settings (so it would be much faster to render that smaller region). Once it’s set the way you want, apply the settings to the whole picture.