Help with texturing

[ocean linden]

I'm trying to mod a train into minecraft but it looks flat and plasticy. Any texture ideas? Or improvements to shading?

[ocean linden]

Made it more metallic, still looks flat though

[stark bloom]

try to place shading throughtout rather than just at the corners, and make it look more weathered. consider its round shape, looking for references online can help figure out where to place highlights and shadows

[river drum]

Try using a different lighter shade for the top

[ocean linden]

I did consider treating the body as though it were round, but I'm not sure if I should keep it with squarish shading. I will move it away from the corners though.