Some time ago I developed a process for Sundance Balloons involving a lot of scripting and some modeling procedures for patterning hot-air balloons. It handles distorting artwork to look correct when inflated and the details needed to output for CNC cutting like seam allowances, labels, alignment marks, and how that differs depending on whether the artwork is made by splitting up a panel into pieces or with a second(or third) layer of fabric sewn on top.
The system enables me to crank out patterns for a simple graphic(for a balloon model I already have set up)in as little as an hour, replacing a fantastically tedious manual process that took weeks. This one took a bit longer than an hour. A typical balloon pattern might wind up with about 600 or 800 pieces to ultimately sew together, this has 2000, with random colors that made each one unique. Heavy use of Rhino’s Universal Deformation tools was made to adjust parts of the design to more or less maintain their proportions as the circumference of the balloon varies.