I always thought you would need a pattern to make swag curtain panels, but you don't! Check out this great tutorial on how to sew swag curtains without a pattern from the book The Complete Photo Guide to Window Treatments, 2nd Edition.
Click on these pages from The Complete Photo Guide to Window Treatments, 2nd Edition to enlarge and read about fabric selection for making swag curtains.
I like how they used little hooks and overlapped the swags!
More about the book:
This is the most comprehensive book on window treatments available, offering inspiring location photography along with step-by-step instructions for making 50 different projects. Window treatments include several curtain styles, formal draperies, swags, valances, cornices, various Roman shades, and roller shades. Designed for the DIY home sewer, this book is also valued by professional workrooms and trade schools because it teaches professional methods for measuring, sewing, and installing window treatments. Now updated with new photography and the latest window treatment styles, this second edition is a must-have for any DIY home sewer.
Linda Neubauer has edited several DIY and home decorating books, including The Complete Photo Guide to Window Top Treatments, The Complete Photo Guide to Curtains and Draperies, and Windows with Style. She lives in Minneapolis, MN.