"Mixing Different Ways to Unwrap a Model" is the fourth in my UV Collection. It using a low-polygon barrel model to demostrate using multiple shading domain with multiple methods of unwrapping while combining it on the previous tutorial's texure map.
http://www.awbenson.com/tutorials/Carrara_UV/UV_4.htm
The reason why you are using the same texture map as the prior one is to demostrate how to combine multiple objects into one map. If you were creating a robot character, you would typically want to have all the pieces together to paint. Henceforth, the combining aspects of this tutorial.
This tutorial can be differcult. It is not like the prior tutorials in which you can finish it within 20 minutes. However, it teaches very important parts of UV unwrapping which is why I couldn't shorten it while still producing a usable object.
The below image is a scene made from my results after painting the UV coordornates from this tutorial.
I hope you like it,