Automatic UV seam creation tool #71958

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Campbell Barton · 2019-11-27T04:16:16+01:00

Campbell Barton commented

2019-11-27 04:16:16 +01:00

Automatic seam creation tool, that balances various goals:

Keep angular and area distortion below a given threshold
Minimize total length of seams and number of islands
Prefer seams along sharp edges / features in the model
Prefer seams to be straight instead of jagged
Make seams symmetric when there is symmetry in the model
Prefer islands for naturally distinct parts of a model (arms, legs, ..)
Avoid too complex concave islands shapes that are difficult to pack

Resources:

xatlas
UVAtlas
D-Charts: Quasi-Developable Mesh Segmentation
.. various more papers can be found, also in the field of mesh segmentation

Split out from #68889.

Automatic seam creation tool, that balances various goals: * Keep angular and area distortion below a given threshold * Minimize total length of seams and number of islands * Prefer seams along sharp edges / features in the model * Prefer seams to be straight instead of jagged * Make seams symmetric when there is symmetry in the model * Prefer islands for naturally distinct parts of a model (arms, legs, ..) * Avoid too complex concave islands shapes that are difficult to pack Resources: * [xatlas](https://github.com/jpcy/xatlas) * [UVAtlas](https://github.com/microsoft/UVAtlas) * [D-Charts: Quasi-Developable Mesh Segmentation](https://www.cs.ubc.ca/~vlady/dcharts/dcharts_eg.pdf) * .. various more papers can be found, also in the field of mesh segmentation Split out from #68889.

Campbell Barton commented

2019-11-27 04:16:16 +01:00

Added subscriber: @ideasman42

Paul Kotelevets commented

2020-01-27 06:13:33 +01:00

Added subscriber: @1D_Inc

Paul Kotelevets commented

2020-01-27 06:13:33 +01:00

Sounds like Smart UV project in 3d view -> seams from islands in UV editor.

Or is it something different?

Sounds like **Smart UV project** in 3d view -> **seams from islands** in UV editor. ![изображение.png](https://archive.blender.org/developer/F8304238/изображение.png) Or is it something different?

Kenzie commented

2020-03-01 00:06:46 +01:00

Added subscriber: @KenzieMac130

Kenzie commented

2020-03-01 00:06:46 +01:00

In #71958#859130, @1D_Inc wrote:
Sounds like Smart UV project in 3d view -> seams from islands in UV editor.

Or is it something different?

Smart UV project isn't exactly the most usable UV unwrapping solution on the market. Compared to recent advancements in UV unwrapping available in other tools (ex: Substance Painter/Houdini/InstaLOD), it really not any good.
The current "Smart" UV is just a dirty hack based on edge angles with no real consideration for the flow of a model's topology or best practices for unwrapping. The proposed tool should be much more robust than that.

> In #71958#859130, @1D_Inc wrote: > Sounds like **Smart UV project** in 3d view -> **seams from islands** in UV editor. > ![изображение.png](https://archive.blender.org/developer/F8304238/изображение.png) > > Or is it something different? Smart UV project isn't exactly the most usable UV unwrapping solution on the market. Compared to recent advancements in UV unwrapping available in other tools (ex: Substance Painter/Houdini/InstaLOD), it really not any good. The current "Smart" UV is just a dirty hack based on edge angles with no real consideration for the flow of a model's topology or best practices for unwrapping. The proposed tool should be much more robust than that.

Paul Kotelevets commented

2020-03-01 12:34:46 +01:00

Well, Smart UV is not a dirty hack, it is just simplest representation of a linear algorithm, that allow to work fast with heavy meshes, or when topology doesnot mean, having a predictable result)
It does it job nice, completing its goal, but the problem that such goal is not universal.

Anyway, it is nice to know that surface/topology tension dependent autoseaming tool was proposed, it will be very helpful)

Well, Smart UV is not a dirty hack, it is just simplest representation of a linear algorithm, that allow to work fast with heavy meshes, or when topology doesnot mean, having a predictable result) It does it job nice, completing its goal, but the problem that such goal is not universal. Anyway, it is nice to know that surface/topology tension dependent autoseaming tool was proposed, it will be very helpful)

Aaron Carlisle commented

2020-10-12 22:13:48 +02:00

Changed status from 'Needs User Info' to: 'Confirmed'

Nika Kutsniashvili commented

2023-01-10 13:46:21 +01:00

Added subscriber: @Nika-Kutsniashvili

Philipp Oeser removed the

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Automatic UV seam creation tool #71958