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I have build a basic house but I would like to use different textures for the roof and walls. Here is what I have now.

enter image description here

The brick texture is on the roof when i want it to be a different texture

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The simplest way if the texture isn't UV-mapped, is to assign each face to separate materials in Edit mode:

1a

then assign appropriate texture to each material, as needed. Otherwise if the texture uses UV map, just separate the UV maps for both sections of the object:

2a

then paint each sections with the appropriate color (the roof is the top section, in this picture).

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    $\begingroup$ How do you "separete the uv maps for both sections"? $\endgroup$ – invicente Apr 24 '14 at 20:32
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You can also create a separate UV layer in Object Data > UV maps:

enter image description here

Blender Internal:

Assign a different material to the roof faces, then select the alternate UV map in the material texture settings:

enter image description here

Cycles:

In cycles the alternate UV map can be selected in a node setup with the Attribute node:

enter image description here

See Can Cycles use multiple UV layers?

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  • $\begingroup$ Can UV maps also be used in attribute nodes? I was only aware of vertex colors. $\endgroup$ – bzal Aug 29 '16 at 12:56
  • $\begingroup$ @bzal Yes, they can. However a separate "UV map" node has been added since this answer was written. In most cases you'll probably want to use that instead. $\endgroup$ – gandalf3 Aug 29 '16 at 17:45

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