simple... open up paintshop or photoshop - use the airbrush tool about size 5 on a seperate raster layer using Multiply @ 50% ... set the airbrush to 10% opacity.
then just go along the lines of the ship ... after you've made it a looks a little shadowed - outline the shadows from the bottom of the line you followed down around 6-7pixels. Gausian Blur @ around 2.0-4.0 depends what looks more right.
then inverse the selection and go over the layer with the eraser to get rid of the useless part of the shadows. inverse it again and create another layer, then using white with slightly more opacity on Colour Dodge - lightly go along the tops of each of the shadows trying to keep as straight as you can (but don't worry greatly cause it'll give the impression of carved wood
if you use Lightwave colour the model something like Lightbrown and bake it with no textures on (you can use that as a general shader level)
if you use Max then Colour the vertex with the Vertex Colour tool in the Utils ... also grab ahold of Texporter and export the vertex colour shades (same as baking)
if you use Maya then i think there's an option to do it tucked under Highlight Shaders in the options. (i'll check it up later)
but you can take that and overlay that as an overlay layer @ 50% and it'll give a nice realistic effect ... infact if you make a new image use that as the background and then take the original texture overlay that at 60% ... then add the shadow/highlight layers your airbrushed it'll come out with some really nice effects
if you want email me the model and i can do it for you and show you what i mean.
Tsu'va Oni Ni Jyuuko Fiori Sei Tau!
One block follows the suit ... the whole suit of blocks is the path ... what have you found?
