well I had already though that I couldn't change character's geometry because it would cause problems with uvs and all the rigging stuff, so I will focus in texturing and shaders.

Stormgetto and thx1138: thanks a lot for your support and help, this really encourages me to do my best.

ive been working in the jeans texture, i wore jeans today () so i can have a clear refference. I'm adding some wrinkles and this is the result: