http://www.w3.org/TR/SVG/filters.html http://www.w3.org/TR/SVG/filters.html Not sure if that's what you're looking for, but it should contain the info for what

http://www.w3.org/TR/SVG/filters.html http://www.w3.org/TR/SVG/filters.html Not sure if that's what you're looking for, but it should contain the info for what is being used. I took a quick glance and it looked like it was at minimum using the following 3 svg filters: ‘feGaussianBlur’ ‘feOffset’ ‘feMerge’