Reply To: ND Grad filters in Ribbet ? Home / Forums / Questions & Answers / ND Grad filters in Ribbet ? / Reply To: ND Grad filters in Ribbet ? Ribbet October 2, 2013 at 5:17 am #3688 Hi macfred64, Thanks for this excellent suggestion. We’ve added this to our wish list and will try to include it in a future Ribbet version. Settings