Software:
Maya 2018
Steps for basic UV unwrapping:
- Select all polygons.
- Apply planar UV projection just to get rid of all the current UV seams.
- Select the edges that that are intended to be UV seams.
- In the UV Editor menu choose Cut/Sew > Cut.
- Select all polygons.
- In the UV Editor menu choose Modify > Unfold.
- In the UV Editor menu choose Modify > Layout.
- Scale and rotate the UV layout to fit the UV space.
Related:
Multiple UV layouts