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When unwrapping an object, there are two options for the Method to use: Conformal, and Angle Based. What is the technical difference between these two methods?

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I usually leave it at Angle Based, but sometimes that distorts tight geometry and I switch to conformal. So basically I just blindly see which looks better project by project, I am interested in how they work.

Note: I am aware of this question and answer, but that more addresses the use of the two methods, I am looking for the technical difference.

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We're looking for long answers that provide some explanation and context. Don't just give a one-line answer; explain why your answer is right, ideally with citations. Answers that don't include explanations may be removed.

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Conformal Uses LSCM (Least Squared Conformal Mapping). This usually gives a less accurate UV mapping than Angle Based, but works better for simpler objects. (As describled by blender user manual)

Attached is the link to the White paper on LSCM

http://www.cs.jhu.edu/~misha/Fall09/Levy02.pdf http://alice.loria.fr/publications/papers/2002/lscm/lscm.pdf

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    $\begingroup$ Please avoid link-only answers. Someone should be able to find an answer to the question from reading your answer without going anywhere else or reading any 10-page paper. I specifically asked for the technical difference between the two methods. (BTW, your two links are to the same document.) $\endgroup$ – PGmath Jan 8 '16 at 14:36
  • $\begingroup$ Well technical as it is, the answer isn't a short one so I thought future questions of such nature could be addressed through understanding those technical papers. The reason why there were 2 links is that if one fails there is another one to it. And the topic cannot be easily addressed in one post anyhow "technically". $\endgroup$ – hawkenfox Jan 8 '16 at 15:56

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