Smart UV Unwrap

Unwraps a mesh automatically according to the selected angle.

There is also an option for a threshold so for example if the angle is set to 90 degrees and the threshold to 10 everything between 80 and 100 degrees will be cut and then unfolded. If you want to add specific edges with different angles select them and click Add edges to cut. Note that this tool is meant to be used for quick automatic unfolds of rather small objects.