Ok this is what I came uo with in half an hour, images from google for texture...tweaked in PS and a bump layer made (black and white). I applied this to a cube...hit some lights and burlap...you have to UV the model of course so grab a tut and go for it. There are some here...just download the bits you want...there are plenty out there for free too if you are tight for dollars. I applied a softish bump map with it...trust me you could tweak this a hell of a lot...but its just to help you get motivated...good luck mate.
cheers bullet
I have the files if you need them...but I dont think you will.
bullet1968
"A Darkness at Sethanon", a book I aspire to model some of the charcters and scenes