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I plan on wrapping a label around this bottle but the label gets distorted everytime, so I've concluded I need measurements to match. I've thought about making edge loops to get a specific height when making a selection and as for the circumference I can only think of counting all the faces and multiplying length times that. Am I on the right track? Let me know if there's a more effective way of achieving this.

enter image description here

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To unwrap a cylinder in correct proportion:

  • Cut a vertical seam where you want it
  • Set an orthogonal view (poles or equator.. here, equator)
  • In edit mode, U unwrap with 'Cylinder Projection' and settings as shown..

enter image description here

  • Oddly, in the 'Radius' field, entering pi*radius

.. which doesn't make sense to me .. but there it is...

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  • $\begingroup$ I am very confused about both the question and the answer. Can anyone elaborate? $\endgroup$ – Coffeehouse May 24 at 10:12
  • $\begingroup$ I interpreted the OP as being about how to generate a UV map for a cylinder in such a way that, if you use it to map a flat image of a label, it winds up on the surface of the cylinder without non-uniform scaling, or distortion. $\endgroup$ – Robin Betts May 24 at 10:33

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