No, I don't think you're overlooking it. RHaseltine reported the same problem. He'd only downloaded the free LE version of the dragon, plus the map pack. A single wing-membrane transmap is included with the full version of the Millennium Dragon, but if you get the map templates, it won't be too hard to paint your own. I'm somewhat surprised that additional transmaps weren't included in the map pack for variety. We don't all have tears in our wings in the same locations.