It's been a long-time since i sewed but i still appreciate this technique of how to sew a dart on the bodice of a blouse without the distorting the print on the cloth. Image a fabric with bird motives and the dart runs through the motif and the bird may lose it's head!

One way to solve this would be to move the dart slightly but that may result in fitting problems. Another way is shown in this tutorial.   http://knotsinthread.blogspot.com/2012/04/shaping-vintage-textiles.html
She snips around the motif and applique that part on top of the dart. Ingenious but only if the fabric does fray easily and workmanship must be delicate.