I know the angles required for a proper iso but can't remember exactly how I drew them. Since I started out with board, t-square, & triangle and adapted what I knew to the 'new' software programes as they came out I'm really not sure I can answer your questions about the isometric protractor and the geometric principles that make iso work. It requires Adobe Reader 9 for proper viewing. I hope I'm not violating forum rules - but you can find samples of my past work in my portfolio at Which is why I'm searching for anything that can help me 'remember' how I did things. That and the fact that the software has evolved so much is really frustrating. Now I'm trying to get back into Technical Illustration and find I only vaguely recall how I drew my iso illustrations. But then I took a job in Security at Los Alamos National Lab doing what I had done in the Air Force.
Up until about 8 years ago I would have considered myself an expert in Illustrator and almost expert in ISODraw.
