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What does unrigged mean? Will the UV map change after it has been "rigged"? 

Thanks

According to widipedia, it's the process of adding a skeleton or a central framework which gives the  capability of affecting the shape or movements of that object.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi