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I unwrapped the whole mesh, but one face is always black, I tried CtrlN and ShiftCtrlN but there is no change.

in the 2d editor "View > UV Local View" isn't selected

you can get the blend here : http://www.pasteall.org/blend/37300

black face in mesh without texture

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  • $\begingroup$ Are you sure nothing is overlapping this particular face. I would suggest for you to unwrap this separately. $\endgroup$ – A.D. Jul 27 '15 at 5:24
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The black face's normal is flipped so you have to recalculate the normals (Toggle into Edit Mode Tab > Select All A > Recalculate Normals Ctrl+N) and also move the light source to see that the texture is there and it's just bad lighting causing the black face.

enter image description here

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  • $\begingroup$ damn! the light... I din't check that! thank you $\endgroup$ – user15944 Jul 27 '15 at 20:16
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There are many reasons why the face can be black.

I think we should take a look at what material is assigned to that face. That is not visible in your screen shot. Different faces can have different materials.

To assign a material to all faces, select all while in edit mode. While still in edit mode, go to material tab, select desired material, and click "assign" button

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  • $\begingroup$ I tried that before posting. I added a link to the blend. $\endgroup$ – user15944 Jul 27 '15 at 15:14
  • $\begingroup$ Ah I see the problem was the normal of that face. I was going to suggest that first, but I figured you would have seen that when you flipped normals back and forth. Always try the "recalculate outside" method of calculating normals first. Cheers! $\endgroup$ – beiller Jul 28 '15 at 3:32
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I would suggest to check your Vertex Color layer.

enter image description here enter image description here

While working in Textured shading mode with the Blender Render engine, vertex color layer is overlayed on the texture with a sort of "multiply" blending mode. So if one of your faces is panted with black (rgb=[0,0,0]), its vertex color will completely overwhelm the face texture.

enter image description here

If you don't want vertex color to be shown while working with texture, but you don't want to lose that vertex color layer, you can create a new, all white, vertex color layer and set it as active.

enter image description here

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  • $\begingroup$ I don't use vertex color, you can check yourself in the .blend $\endgroup$ – user15944 Jul 27 '15 at 15:13

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