If I knew how to make the realistic skin texture I would have written tutorial about it, but since I don't know how, I can only scream for help.
I looked for the books about photoshop and basicly they are more oriented on photos and some basic texture making like you can find everywhere on the net.
Using photos for texturing is not bad, but when you need hi_res texture like 4000x4000 just for a one par of body like legs or head I think a photos wont do the job. Especially when your cam is close to an object, you need details for realism. Forgive me but I'm addicted in achieving the realism,I'm one of those Jurassic Park and LOR fans, amazed by its creatures in every segment of modeling,texturing,and animation!

Sorry for English,is that aaaa first or second conditional in the first sentense???
HVALA-meaning-THANK YOU
C U :-)