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"Cut-out" effect

Hi everyone,

I am trying to make a path paved with bricks/stones that is similar to this Skyrim screenshot:

TESV%202014-07-28%2006-12-44-92.jpg


In this screenshot, it almost looks like the "stony" part of the path is a separate piece of geometry from the terrain that it's resting on. That is the exact effect I am trying to achieve.

But, whenever I paint textures onto a terrain in any engine, the edges of the textures always come out fuzzy, not sharp and separate like they are here. This does not look good when I am trying to use a texture to create the effect of a road paved with stones.

Sorry I am new to this and I am completely stumped: how do you achieve an effect like this, as if parts of the texture were "cut out" so precisely? Is it done with special shaders?

DO you use separate geometry, and, if so, how do you ensure that it follows the exact curves of the terrain so well?

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