How to get such effects with Blender’s renderer or Yafray? Is it even possible?
NPR:
http://www.reyes-infografica.com/imagen/npr/screen/npr101a.jpg
http://www.reyes-infografica.com/imagen/npr/images/stilllife04.jpg
http://www.reyes-infografica.com/imagen/npr/images/lakescene.jpg
Cartoonish:
http://www.reyes-infografica.com/imagen/cartoon/screen/cartoon01a.jpg
http://www.reyes-infografica.com/imagen/cartoon/images/run11.jpg
http://www.reyes-infografica.com/imagen/cartoon/images/run06.jpg
http://www.reyes-infografica.com/imagen/cartoon/images/run09.jpg