Pretty much what the title says. My seams are definately all closed and connected. Why are they separate in the UV editor? Also, is there a way for me to select faces on an area where seams are marked, and save that as some kind of section, so that I can just click and apply the texture without having to select each individual face later on? enter image description here


Please use the terminology correctly. There are no separate seams in your UV editor. These are called UV islands. Also you do not apply a texture to faces, you can assign a material to faces and that material may use various textures for various properties of it. You can hover your mouse over some face, edge or vertex and press l to select linked elements limited by seams(ctrl+l to select linked with something already selected), you will need to make sure that Seam is selected under Delimt in the F6 panel or at the bottom of the t panel just after you press l same way as you can set properties for any other operation in Blender just after it is performed.

l for link selected works on faces, edges or vertices

You did not describe what steps you take before the problem appears so it is hard to tell where you are making the mistake, but the process of UV mapping in Blender is quite simple, so if you follow it right, you should avoid any issues like this.

  1. In edit mode select edges that you want as seams for the UV islands make sure they will be possible to unwrap to 2D islands and mark them as seams(ctrl+e -> a), there is also a clear seam option in the ctrl+e menu.
  2. Select all the geometry you wish to unwrap in edit mode(could be only some faces but in your case it is all the geometry so hit a to deselect whatever you have selected and then a again to select all) and unwrap the UVs(u -> u in 3d viewport). I think here is where you made the mistake - I am guessing you only selected some faces when unwrapping instead of all you wanted.

That's it. Now if you are happy with the UVs you would assign a material to your mesh and then paint the textures for it. You can also pin UVs(p to pin alt+p to unpin) in the UV editor and then re-unwrap so Blender will keep the pinned UVs in place and will recalculate other UVs so they spread uniformly keeping the pinned UV in the same place. You will have to play around with it to see where this is useful.

  • $\begingroup$ Martin, you say "you can hover your mouse over some face, edge or vertex and press l to select linked elements limited by seams", but actually it's only limited by seams if you use the face selection mode, l will select the whole mesh if you are in edge or vertice mode... or maybe I misunderstood what you meant? $\endgroup$ – moonboots Aug 11 '18 at 9:31
  • $\begingroup$ It does indeed work as I described earlier. You can definitely use it no matter what components you use it on. $\endgroup$ – Martynas Žiemys Aug 11 '18 at 11:05
  • $\begingroup$ oh ok sorry I didn't know the options of the L key on the bottom of the T menu $\endgroup$ – moonboots Aug 11 '18 at 11:23
  • $\begingroup$ It's t panel, not t menu. There is nothing called t menu in Blender. Terminology is important. Please use it correctly. Words that can be synonyms in natural language may mean completely different things in 3d context. You have to use the right ones if you want people to understand you. $\endgroup$ – Martynas Žiemys Aug 11 '18 at 12:13
  • $\begingroup$ Sorry about the terminology. Still figuring it out. My steps are marking my seams, and doing a smart uv project, which works better than the other unwrap methods but still disconnects some faces in the UV grid. Pretty much exactily as you've explained in option 2. I didn't know that I could select the uv islands with L though. So that's useful and by selecting UV's, I can at least see which face is being disconnected which is helpful as well. $\endgroup$ – Martin Marino Aug 12 '18 at 6:11

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