Thanks Sharon,
I have learned it from an American stained glass artist (master) that lived in a town near by, at that time he whas 91 years old, and im his last student. Think he whas the most difficult person but also the most important person in my live. Did gett al his tools and machine,s after four years of study and the quote now you know how to work with glass and i cant learn you nothing else.
So i have learned it the hard way ,tiffany , stained glass , paint burning etc , thought at start that it whould take a year , but he always told me your finised when i say you are.
The butterfly doors whas one of my last things he made me make, took a lot of time to make the pattern for it because right angled he didnt allow in these sliding doors.
Also had to rebuild the livingroom for the doors