[image: 52e549ed-712b-45d5-ba4e-ca5fd2460258.png] Now that it's ok, I'm wondering whether is is possible to directly use a QByteArray or anything else instead of a file as on my application I edit the model graphically and would like to be able to reflect any change I make to the unfolded 2D pattern to the 3D View. In fact write the file won't take long but it would be great to avoid it.