there are some situations where even bodypaint 3D and photosop will not give you enough tools to texture  complex shapes on your figure,object,.....

 

here is an example. i wanted to wrap a tattoo around the arm. of course i could do it piece by piece and then stich it together. but it would take hours for good results. but at the end it still would not be perfect.

 

but then  i found this blender video.

http://www.screencast.com/users/blenderwho/folders/Jing/media/8999e39f-0a49-464a-b558-e3ac2bcc8c4f

 

so what does this video show? it shows two objects with the same shape correct? but they have different topology and different UV's. so in blender you can bake a texture from a high poly object to a low poly object with different UV's. ok this if awesome. but you can do more.

 

i modeled a simple plane wraped around M4 arm. because it was simple and low poly i could Unwrap it and texture it . without any problem . then i added a tattoo text. tattoo that you can find on arms. 

then projected the texture from the wraped plane to M4's body. NO,seams,NO stretching.