And a breakdown of how it was built: http://iquilezles.org/www/material/function2009/function2009.pdf http://iquilezles.org/www/material/function2009/function2

And a breakdown of how it was built: http://iquilezles.org/www/material/function2009/function2009.pdf http://iquilezles.org/www/material/function2009/function2009...