Manual Texture Layout
Maya 2012 Tutorial
How to Manually Create a UV Map in Maya
Manual UV layout is accomplished by selecting your object's faces one at a time. With one face selected, you then activate the Planner Mapping feature.
Add a polygon pyramid to the workspace by choosing Create > Polygon Primitives > Pyramid (default settings).
To view the object and UV Texture Editor at the same time, choose Panels > Saved Layouts > Persp/UV Texture Editor.
Using the Scale tool (r key), make the pyramid taller.
In the UV Texture Editor, notice that the layout differs from the actual polygons that define the object.
Using the Select tool (q key), right-click the object in the workspace and choose Face.
Click the front face to select it and choose Create UVs > Planner Mapping (include options) from the Polygon menu set.
In the options, select Best Plane and Keep Image Width/Height Ratio. Click Apply.
Repeat steps six and seven for each of the four remaining faces.
Right-click the object in the workspace and choose Object Mode. Click away from the pyramid, then click the pyramid to select it.
Choose Polygons > Layout from the UV Texture Editor menu items.
In the UV Texture Editor all the faces look pretty good except the square base is too large. Right click the base and choose Face. Choose Tool > Move UV Shell tool, then click one of the base lines.
Click the Scale tool (r key) and resize the base so it approximately matches the base edge of the side polys. You can press the w key and r key to toggle between the Move and Scale tools.
With the Select tool (w key), right-click the base and choose Edge. Click one of the base edges.
Choose Polygons > Move and Sew UV Edges.
Left-click the other three base edges one at a time and click the Move and Sew UV Edges icon for each of the remaining three edges.
Right-click the pyramid in the workspace and choose Object Mode. Click away from the object, then click the pyramid to select it.
Choose Polygons > Layout in the UV Texture Editor to center your new UV shell.