Unwrap selected #78394

New Issue

Daniel Bystedt · 2020-06-28T21:49:23+02:00

Daniel Bystedt commented

2020-06-28 21:49:23 +02:00

UV unwrap only selected components.

Starting point.

The selected uv’s are quite distorted. The goal is to only unwrap the selected uv’s so that they will be less distorted. Unselected uv’s should stay in the same position after unwrap

{F8652045, height=250}

Undesired result.

All uv’s of the object are unwrapped and transformed

{F8652049, height=250}

Desired result.

Unselected uv’s are kept in the same position and the selected uv’s are unwrapped.

My spontaneous approach would be to temporarily

Store
- Original pinning
- Original seams
Set seams from islands
Pin unselected
Unwrap
Restore
- Original pinning
- Original seams

{F8652053, height=250}

UV unwrap only selected components. **Starting point.** The selected uv’s are quite distorted. The goal is to only unwrap the selected uv’s so that they will be less distorted. Unselected uv’s should stay in the same position after unwrap {[F8652045](https://archive.blender.org/developer/F8652045/image.png), height=250} ### Undesired result. All uv’s of the object are unwrapped and transformed {[F8652049](https://archive.blender.org/developer/F8652049/image.png), height=250} **Desired result.** Unselected uv’s are kept in the same position and the selected uv’s are unwrapped. My spontaneous approach would be to temporarily - Store - Original pinning - Original seams - Set seams from islands - Pin unselected - Unwrap - Restore - Original pinning - Original seams {[F8652053](https://archive.blender.org/developer/F8652053/image.png), height=250}

Daniel Bystedt commented

2020-06-28 21:49:23 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Daniel Bystedt commented

2020-06-28 21:49:23 +02:00

Added subscriber: @DanielBystedt

Eugene Du commented

2020-06-29 10:18:25 +02:00

Added subscriber: @APEC

Matt commented

2020-07-01 04:43:17 +02:00

Added subscriber: @mattli911

Matt commented

2020-07-01 04:43:17 +02:00

Ideally as part of this, or maybe needs to be another task, we get a true relax tool/ method, that respects the 3D geometry / tries to reduce distorting based on that.

https://blender.community/c/rightclickselect/mccbbc/

Ideally as part of this, or maybe needs to be another task, we get a true relax tool/ method, that respects the 3D geometry / tries to reduce distorting based on that. https://blender.community/c/rightclickselect/mccbbc/

Eugene Du commented

2020-07-01 09:40:58 +02:00

Also current Unwrap do not identify UV islands without Mark Seam on them.
Example

{F8656472}

Also current Unwrap do not identify UV islands without Mark Seam on them. Example {[F8656472](https://archive.blender.org/developer/F8656472/Unwrap_1.png)}![Unwrap_2.png](https://archive.blender.org/developer/F8656473/Unwrap_2.png)

Sebastian Włoszek commented

2020-07-07 11:04:38 +02:00

Added subscriber: @Idlero

Gilberto Rodrigues commented

2020-07-27 21:26:06 +02:00

Added subscriber: @Gilberto.R

Gilberto Rodrigues commented

2020-07-27 21:26:06 +02:00

Also, currently if you select an Island and Unwrap it in the UV editor with UV Sync off, the whole object is unwrapped, not only the selected Island.
.
unwrap0001-0285.mp4

Also, currently if you select an Island and Unwrap it in the UV editor with UV Sync off, the whole object is unwrapped, not only the selected Island. . [unwrap0001-0285.mp4](https://archive.blender.org/developer/F8723586/unwrap0001-0285.mp4)

Paul Kotelevets commented

2021-08-26 23:27:46 +02:00

Added subscriber: @1D_Inc

Paul Kotelevets commented

2021-08-26 23:27:46 +02:00

In #78394#970443, @APEC wrote:
Also current Unwrap do not identify UV islands without Mark Seam on them.
Example

{F8656472}

That's why "set UV seams from islands" exist, I guess.

> In #78394#970443, @APEC wrote: > Also current Unwrap do not identify UV islands without Mark Seam on them. > Example > > {[F8656472](https://archive.blender.org/developer/F8656472/Unwrap_1.png)}![Unwrap_2.png](https://archive.blender.org/developer/F8656473/Unwrap_2.png) That's why "set UV seams from islands" exist, I guess.

Vyacheslav Kobozev commented

2021-08-27 01:41:10 +02:00

Added subscriber: @Vyach

Vyacheslav Kobozev commented

2021-08-27 01:41:10 +02:00

For such cases I use island unwrap with pinned points.
And yes, it will be cool to have such «autopin» out of box

For such cases I use island unwrap with pinned points. And yes, it will be cool to have such «autopin» out of box

Matt Fagan commented

2022-02-03 17:23:20 +01:00

Added subscriber: @Doowah

Matt Fagan commented

2022-02-03 20:44:07 +01:00

I'd like to add some context in request in prioritizing this task in a higher category for "To do". I very much agree "Unwrap Selection" is VERY MUCH NEEDED. I want to bump this task up right now before too much effort gets placed into the "Texturing" portion of Blender 3.0 updates. Because at the end of the day, texturing to this day. Heavily relies on good UVs, and right now. Blenders toolkit for UV creation and editing, is severely lacking in many fundamental aspects that other software's have made standard in the way Artists handle creating UVs.

In order to make this feature entirely complete and satisfactory for all artists in all industries. We need the functionality to include "Unwrap selection" & "Axis only Selection" as well. The user should be allowed to select an objects UV points in the UV editor (after unwrap.) Then based on the selection, the user can initiate the unwrap operation based on a selection that is dominate in a particular axis (Vertical, or Horizontal) only.

Right now, Blender has No intelligent method to the determine correctly the distances the UV's are in their 3D space as Vertices from one another in measurement. Because when it comes to UV mapping (Organic) shapes, characters primarily. Creating square/straightened UV islands leads to very noticeable seam distortions. Where the UV points on adjacent sides do not line up with one another. Having to do so by hand with snap functionality can require a users time to 10 minutes per island at minimal, to often much much more. This entire functionality would benefit artists of Blender who UV map their assets for production & personal purposes profoundly. Which would eliminate the need to resort to other 3D UV software's to complete this part of the job, correctly and accurately.

Note: The whole entire reason an Artist NEEDS to create straight UV islands. Is for tiling texture details (seamlessly) on those portions of the model. While utilizing shaders efficiently with minimal texturing. This is standard practice, and marking seams and base unwrapping a model with packing and calling it a day. Is not practical at any capacity. Let alone in any production environment.

A visual Step-by-step example of this for clarity:

Other Software Example (Ideal scenario)
{F12845229}
{F12845230}
{F12845231}
{F12845232}

I'd like to add some context in request in prioritizing this task in a higher category for **"To do"**. I very much agree "Unwrap Selection" is VERY MUCH NEEDED. I want to bump this task up right now before too much effort gets placed into the *"Texturing"* portion of **Blender 3.0 updates**. Because at the end of the day, texturing to this day. Heavily relies on good UVs, and right now. Blenders toolkit for UV creation and editing, is severely lacking in many fundamental aspects that other software's have made standard in the way Artists handle creating UVs. In order to make this feature entirely complete and satisfactory for all artists in all industries. We need the functionality to include **"Unwrap selection"** & **"Axis only Selection"** as well. The user should be allowed to select an objects UV points in the UV editor (after unwrap.) Then based on the selection, the user can initiate the unwrap operation based on a selection that is dominate in a particular axis (Vertical, or Horizontal) only. Right now, Blender has No intelligent method to the determine correctly the distances the UV's are in their 3D space as Vertices from one another in measurement. Because when it comes to UV mapping (Organic) shapes, characters primarily. Creating square/straightened UV islands leads to very noticeable seam distortions. Where the UV points on adjacent sides **do not line up** with one another. Having to do so by hand with snap functionality can require a users time to 10 minutes per island at minimal, to often much much more. This entire functionality would benefit artists of Blender who UV map their assets for production & personal purposes profoundly. Which would eliminate the need to resort to other 3D UV software's to complete this part of the job, correctly and accurately. Note: The whole entire reason an Artist NEEDS to create straight UV islands. Is for tiling texture details (seamlessly) on those portions of the model. While utilizing shaders efficiently with minimal texturing. This is standard practice, and marking seams and base unwrapping a model with packing and calling it a day. Is not practical at any capacity. Let alone in any production environment. A visual Step-by-step example of this for clarity: ![1_BUnwrap.jpg](https://archive.blender.org/developer/F12845225/1_BUnwrap.jpg) ![2_BmaxalignUV.jpg](https://archive.blender.org/developer/F12845226/2_BmaxalignUV.jpg) ![3_BUnwrapSelect.jpg](https://archive.blender.org/developer/F12845227/3_BUnwrapSelect.jpg) ![4_BUnwrapSelectAxis.jpg](https://archive.blender.org/developer/F12845228/4_BUnwrapSelectAxis.jpg) **Other Software Example (Ideal scenario)** {F12845229} {F12845230} {F12845231} {F12845232}

Paul Kotelevets commented

2022-05-08 09:14:29 +02:00

Right now, Blender has No intelligent method to the determine correctly the distances the UV's are in their 3D space as Vertices from one another in measurement.

The ability to transfer loop distances from mesh to uv was added in Smart UV addon. It allow to avoid some unpleasant UV distortions.

https://vimeo.com/221992599?embedded=true&source=video_title&owner=48181948

> Right now, Blender has No intelligent method to the determine correctly the distances the UV's are in their 3D space as Vertices from one another in measurement. The ability to transfer loop distances from mesh to uv was added in Smart UV addon. It allow to avoid some unpleasant UV distortions. https://vimeo.com/221992599?embedded=true&source=video_title&owner=48181948

Chris Blackbourn commented

2022-05-14 06:19:30 +02:00

Added subscriber: @Chris_Blackbourn