DQ in edit mode
The Quad Unwrap tool is used to unwrap a selection in a rectangular way, that is suitable for Panel Trims.
Internally it is comprised of 3 different algorithms, that are chosen based on the selection.
For convenience the first algorithm used by Quad Unwrap, is also used by the Unwrap Trim tool when unwrapping Panel Trims.
- All-quad face selection
- Selection contains triangles or n-gons, but is one face deep
- Selection contains triangles or n-gons, but is multiple faces deep and is not cyclic
Keep in mind
It is highly recommended to work in a way, that your selections fit 1. or 2.
The 3rd allgorithm, always requires some post-work, and also doesn't work at all for cyclic selections.
Usually it's worth the effort to just temporarily remove or add edges, to ensure the selection is all-quad, then unwrap, then restore the original topology.