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Help needed. I am using Blender 2.79 - I have a dress that I modeled and then unwrapped in UV layout. The problem is that I never added any material zones. What I would like to do now is add materials by UV island without having to try to select all those proper polys in 3d menu. Is there a way to add material zones by uv? Any help is appreciated!

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If you are in your UV Editor, you could select a Polygon Face of any island and then hit L on your keyboard to select the island , after that you could assing a material.

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Hope that helps.

Good Luck

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One way is to use Select Linked command in the viewport and constrain it by seams.
If there aren't seams already on the mesh choose UV > Seams From Islands in UV editor (when UV map is visible).
With seams available select a face of the mesh and press Ctrl+L (or L if mouse cursor is over the mesh) while in 3D viewport. In operator options (F6) choose Seams.

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Now there will be selected only that part of mesh geometry corresponding to one of the islands.

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  • $\begingroup$ Thanks. I tried that and it works to select the islands. But then when I try to assign the materials, they still all just assign to the entire mesh. $\endgroup$ Jan 15 '19 at 0:51
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    $\begingroup$ @VictorCsakany it seems that you selected islands in the UV editor. What this answer assumes is selecting geometry in the viewport, then if there are more than 1 material faces will be assigned to chosen one. $\endgroup$
    – R El Clein
    Jan 15 '19 at 10:46

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