The following video provides an overview of how Unwrella works:
In most cases Unwrella is highly automated, so you won’t need more than a few steps to get your unwrapped UV map.
1. Create a model, apply the modifier. Optionally adjust settings for Unwrella to fit your needs (i.e. texture size, maximum allowed texture stretch), then press "Apply".
2. Already finished! Test it with a checker map. The unwrapped model has evenly distributed squares and the chunks of the map are optimally packed. If you’re not yet completely satisfied with the result, just correct some of the parameters and apply again. Activating "High Quality" will produce better maps, but will also require more RAM.
Unless you’ve set the options to allow for higher stretching, visibility of seams will be reduced optimally, regardless of the map you intend to bake (diffuse, normals, specular, etc).
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