Fascinating tutorial on trial-and-error charting of a very complex lace stitch, working from a photo of a swatch. By Twosheep. Also links to chart of the Estonian lace stitch that is shown. Watch a designer's mind as she attacks a vexing problem!
Alsacian Scallops Lace Knitting. Best lace knitting 2018. Written instructions and video tutorial are included for your convenience. - KnittingStitches.org