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uhm... you should be able to find something^^
http://www.wayofthepixel.net/pixelation/index.php?topic=3467.0
http://www.pixeljoint.com/pixels/tutorials.asp
didn't even use the search engine
there are different kind of techniques how to make surfaces... the first thing though is to learn basic light direction, its hard ( I haven't master it) but its vital for the outcome of your image.
first to texture you image... figure out what kind of colour you want... then, from where the light are coming....

this is a good start... practice the light to begin with.... read tutorials in the links above...
come back with a nice picture for us to comment
//Albin
http://www.wayofthepixel.net/pixelation/index.php?topic=3467.0
http://www.pixeljoint.com/pixels/tutorials.asp
didn't even use the search engine

there are different kind of techniques how to make surfaces... the first thing though is to learn basic light direction, its hard ( I haven't master it) but its vital for the outcome of your image.
first to texture you image... figure out what kind of colour you want... then, from where the light are coming....

this is a good start... practice the light to begin with.... read tutorials in the links above...
come back with a nice picture for us to comment

//Albin