Hello, another day, another struggle with UV mapping uv unwrap not uniform scale.3dm (3.1 MB) For sure there is some geometrical reason why it acts like that but please take a look at these two meshes, both created in Rhino 7, both with the same unwelded edges/seams, but one of them was exported …

@DavidEranen - can you comment on this? -Pascal

[image] Czaja: is it even possible to achieve in ¡I support your fight for UV mapping too! In short, _ExtrudeCrvAlongCrv with options (splitattangent no, ) or _Sweep1 and rotate the UV mapping island in the same direction. If you use unwrap but give you bad result, you can extract the sur…

[image] AlanMattano: do not use Blender because it will not preserve your vertex normals properly making incorrect average vertex normals. That one is interesting, could you provide some example? [image] AlanMattano: RizomUV Real Space Yup, it looks great. I was hoping that I can get …

[image] Czaja: That one is interesting, could you provide some example? When you apply UV mapping in Blender, Blender makes a new average vertex normal instead of preserving the super awesome Rhino vertex normals. Imagine a transition from a flat surface to a constant radius surface (corner …

Hi @Czaja , Rhino uses LSCM for unwrapping. Angle based flattening has been requested earlier and I believe that is what you have used in Blender for the better of the two results. I will add reference to this thread for RH-42693 Unwrap: option to use angle based flattening algorithm

@Jussi_Aaltonen by the way (probably is too early to ask for), but in Rhino we will need a UV packing at some point.

[image] Jussi_Aaltonen: option to use angle based flattening algorithm Hi Jussi, please add Arap to the list. _ c.

@clement You request is logged now: RH-62585 Unwrap - Option to use ARAP

@AlanMattano I filed your request: RH-62586 Texture mapping: UV packing

I’m not a programmer so I hope I am not mistaking anything. UVPacker provides a free C++ library (even for the commercial products). Plugin does a great job inside Blender, so maybe they could be used inside Rhino?

Unwrap - non uniform scaling

Rhino

brian (Brian Gillespie) July 20, 2022, 12:14am 21

RH-62585 is fixed in the latest WIP

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Unwrap - non uniform scaling

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