3dsmax : cracks between the bricks

I'm making a house of lego bricks, and the cracks between the bricks are not visible. I tried to make it piece by piece.. but still the cracks are not visible.. any ideas?
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Vertex Master

All you need is to put yer texture in photoshop and draw a thin line of darker color at the bottom of the texture, then align your texture bottom with brick bottom
same for sides

sure but thats cheating
it's like fakeing the cracks
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Vertex Master

What's cheating?
isn't all 3d cheating?

modeling is allways better than texturing
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Vertex Master

But what about scrapes and rust on metal. That's not modeled.
How would you model scratches and all that anyway?

By using zbrush,
with displacement map dumped to max..as 1
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Vertex Master

Is that in max?

no its an organic modeler
clay technics
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Vertex Master

Man I have a lot to learn about modeling.