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So, I've been unwrapping semi-circular objects and this happens:

bolt_uv

I wanted to know if it is a configuration setting that I'm screwing up or something like that. I can edit it but it is a huge pain, in some tutorials they just work. This is killing me slowly and surely.

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  • $\begingroup$ how did you unwrap it? what option? $\endgroup$ – moonboots Aug 16 '18 at 15:09
  • $\begingroup$ The unwrap option, no smart, spherical or nothing. Its a simple object :C, I only added 3 seams $\endgroup$ – Graudhir Aug 16 '18 at 15:13
  • $\begingroup$ perhaps share your file so that we can test $\endgroup$ – moonboots Aug 16 '18 at 15:25
  • $\begingroup$ It looks like if your normals are flipped. With everything selected try Ctrl-N and Unwrap it again. $\endgroup$ – quiliup Aug 16 '18 at 15:27
  • $\begingroup$ I tried flipping, did'nt work :c, i will try to share my file $\endgroup$ – Graudhir Aug 16 '18 at 15:41
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The solution is:

In Object Mode: Apply the scale first.

Now you can unwrap it.

See the image below:

enter image description here

Edit: It is a good practice to Apply any transformations (scale, rotaion...)before using any modifier or/and Unwrap.

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  • $\begingroup$ Oh my gawd, thank you so much, man! Now I will always keep that in my ocd checklist. You guys are freaking fast. I was aways afraid of seeking help in forums, but I loved it. Thanks to everyone again <3 $\endgroup$ – Graudhir Aug 16 '18 at 16:16
  • $\begingroup$ You need to choose one of these answers. $\endgroup$ – LeoNas Aug 16 '18 at 16:18
  • $\begingroup$ I think what LeoNas means is that if one of these answers has solved your question, you can 'accept' it. See: meta.stackexchange.com/questions/5234/… $\endgroup$ – Ray Mairlot Aug 16 '18 at 16:21
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When I try and unwrap your model a message appears in my toolbar:

enter image description here

And when looking at your object's dimensions, I see, as the previous message indicated, that your object has non-uniform scale (not all values are '1'), meaning the object has been scaled in object mode:

enter image description here

The unwrap operation works on the vertices, essentialy ignoring any scaling in object mode you have done to the object (as I understand it). You need to 'apply' the scaling you did in object mode, to the underlying vertices. You can do this by pressing Ctrl+A and choosing Scale.

See Why is it important to apply transformation to an objects data? for more information.

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  • $\begingroup$ Wow, I also never noticed error messages in blender, now I look for them, and aways apply transformation changes :D. Thank you very much. $\endgroup$ – Graudhir Aug 16 '18 at 16:20

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