I've noticed many people who have their final texture only have one half the model, or have multiple parts of the model share the same UV area. For example, two halves of a gun, or the ridges of a scope mount. How can I accomplish this?
1 Answer
Mark Seams in edit mode and uv map as in image above.
Move UV island on top of the other as in image above. You can do a more precise job than I did. I did not place them on exactly top of each other because I wanted to emphasize that both halves of the sphere have UV coordinates. I wanted you too see both almost coincident.
If I did a perfect job and the islands were coincident that would be useful too. So in the image/uv window you might think some pieces of the uv are missing when they are coincident. That could be confusing. Islands can be scaled small, merged to same point, or moved off the uv coordinate area. So again they would be difficult to notice.
Select the vertices of the discussion, view othogonal, so that the vertices line up, then project.
Lastly there are three modifiers you might consider. UV Warp, UV Project and Data Transfer.
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$\begingroup$ Hi, that's how I currently do my UV maps. Works nicely, however I was asking how I could for example use the same UV/texture of one half of the sphere for both, with only using the UV space for one half of the sphere $\endgroup$– ethosiumDec 26, 2015 at 10:13
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$\begingroup$ @ethosium, that is what they are trying to explain (in poor english), you only texture half of a model. Then, UVMap two halves to the same area on your texture. You could, in theory, map the entire sphere with only two faces showing in the UVMap. (one tri, one quad, in ths case.) Then, all faces just get stacked, like layers. (coincident) In blender specifically, model with the mirror modifier, and UV unwrap before applying the modifier, then both halves are done for you. $\endgroup$– dvalJan 25, 2016 at 20:53