This website has some nice explanations (old, but still relevant) http://iquilezles.org/www/articles/raymarchingdf/raymarchingdf.htm http://iquilezles.org/www/

This website has some nice explanations (old, but still relevant) http://iquilezles.org/www/articles/raymarchingdf/raymarchingdf.htm http://iquilezles.org/www/articles/raymarchingdf/raymarching... Edit: Direct link to Iñigo Quílez' s presentation http://iquilezles.org/www/material/nvscene2008/rwwtt.pdf http://iquilezles.org/www/material/nvscene2008/rwwtt.pdf