Regression: Smart UV project stopped aligning islands vertically #110724

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opened 2023-08-02 17:39:06 +02:00 by Adam Preisler · 7 comments

Adam Preisler commented

2023-08-02 17:39:06 +02:00

System Information
Operating system: Win11
Graphics card: 4090 RTX

Blender Version
Broken: (3.6.1)
Worked: (3.5)
Caused by 4b4babae8b

Short description of error
In the past it was possible to easily unwrap selection of many many many many many elements and they will be aligned vertically based on which direction they are longer in. This is super useful for anisotropic materials like wood for example or even brushed steel because it will usually be brushed in the longer direction.

Exact steps for others to reproduce the error
Open the attached .blend file in 3.3.5 and use Smart UV Project in Edit Mode
Then open the same file in 3.6.1 and try Smart UV Project again

3.3.5	3.6.1

**System Information** Operating system: Win11 Graphics card: 4090 RTX **Blender Version** Broken: (3.6.1) Worked: (3.5) Caused by 4b4babae8b495936ed8c9c00b7bf1486d2107107 **Short description of error** In the past it was possible to easily unwrap selection of many many many many many elements and they will be aligned vertically based on which direction they are longer in. This is super useful for anisotropic materials like wood for example or even brushed steel because it will usually be brushed in the longer direction. **Exact steps for others to reproduce the error** Open the attached .blend file in 3.3.5 and use Smart UV Project in Edit Mode Then open the same file in 3.6.1 and try Smart UV Project again | 3.3.5 | 3.6.1 | | -------- | -------- | | ![image](/attachments/e25fcd3f-93a6-4e98-aec3-862dcf76cfb9) | ![image](/attachments/4590c49b-3c8d-43c5-af5f-a486996b9382) |

Bug_Smart-UV-Project.blend

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Adam Preisler added the

labels 2023-08-02 17:39:07 +02:00

Pratik Borhade commented

2023-08-03 07:37:36 +02:00

Member

Thanks for the report. I can confirm (broke between 3.5-3.6).
@Chris_Blackbourn , can you check? (Any idea which of your commit has affected this? Otherwise I'll bisect)

Thanks for the report. I can confirm (broke between 3.5-3.6). @Chris_Blackbourn , can you check? (Any idea which of your commit has affected this? Otherwise I'll bisect)

Pratik Borhade added

and removed

labels 2023-08-03 07:37:57 +02:00

Chris Blackbourn commented

2023-08-03 10:23:52 +02:00

Member

I think this is a duplicate of #109906
(Although, with a different operator, same underlying cause)

If you're hunting for the exact change, the class which has the changed behavior is UVMinimumEnclosingSquareFinder
See also rotate_inside_square.
There might be different times in the history when it's active/inactive...

I think this is a duplicate of https://projects.blender.org/blender/blender/issues/109906 (Although, with a different operator, same underlying cause) If you're hunting for the exact change, the class which has the changed behavior is `UVMinimumEnclosingSquareFinder` See also `rotate_inside_square`. There might be different times in the history when it's active/inactive...

Chris Blackbourn commented

2023-08-03 10:25:30 +02:00

Member

BTW, most likely same fix, after smart unwrap, just use "UV > Align Rotation > Auto" and the results will probably be better than with 3.5

BTW, most likely same fix, after smart unwrap, just use "UV > Align Rotation > Auto" and the results will probably be better than with 3.5

Pratik Borhade commented

2023-08-03 10:51:02 +02:00

Member

Thanks, will do :)

Thanks, will do :)

Pratik Borhade referenced this issue

2023-08-04 05:20:58 +02:00

UNWrap too many different kind bug. #110770

Pratik Borhade commented

2023-08-04 08:26:55 +02:00

Member

Caused by 4b4babae8b

(both bugs introduced by different commits)

Caused by 4b4babae8b495936ed8c9c00b7bf1486d2107107 (both bugs introduced by different commits)

Pratik Borhade changed title from ~~Smart UV project stopped aligning islands vertically~~ to Regression: Smart UV project stopped aligning islands vertically

2023-08-04 08:27:09 +02:00

Pratik Borhade added this to the 3.6 LTS milestone 2023-08-04 08:27:47 +02:00

YimingWu referenced this issue

2023-08-06 15:15:42 +02:00

Unwraping simple objects at angle #110847

Pratik Borhade referenced this issue

2023-08-16 08:20:39 +02:00

UNWrap too many different kind bug. #110770

Brecht Van Lommel referenced a pull request that will close this issue

2023-09-12 18:32:55 +02:00

UV: tweak packing heuristics to reduce rotations #112295

Brecht Van Lommel referenced this issue from a commit

2023-09-14 19:05:13 +02:00

UV: when finding the best packing method, use area as tie breaker

Brecht Van Lommel closed this issue

2023-09-14 19:05:14 +02:00

Blender Bot added

and removed

labels 2023-09-14 19:06:00 +02:00

Brecht Van Lommel referenced this issue

2023-09-14 19:47:07 +02:00

Blender LTS: Maintenance Task 3.6 #109399

Brecht Van Lommel referenced this issue from a commit

2023-10-05 20:44:24 +02:00

UV: when finding the best packing method, use area as tie breaker

Adam Preisler commented

2023-12-18 12:14:06 +01:00

Author

Blender Version:

The issue is still there, I always have to select the elements that were mapped to the bottom right are rotate them by 90 degrees so that everything is aligned properly.

The Align Rotation operator doesn't give better results with any settings I tried.

Sorry if I reopened this issue wrongly.

Blender Version: ![image](/attachments/7a0fd2bf-7ea7-4481-a40a-239e650bb5f2) The issue is still there, I always have to select the elements that were mapped to the bottom right are rotate them by 90 degrees so that everything is aligned properly. The Align Rotation operator doesn't give better results with any settings I tried. ![image](/attachments/429908d7-1002-411e-a1a0-255f3c77061b) Sorry if I reopened this issue wrongly.

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Adam Preisler reopened this issue

2023-12-18 12:14:10 +01:00

Blender Bot added

and removed

labels 2023-12-18 12:14:12 +01:00

Pratik Borhade commented

2023-12-19 10:06:50 +01:00

Member

@AdamPreisler hi, can you open a new report with necessary details?

@AdamPreisler hi, can you open a new report with necessary details?

Pratik Borhade closed this issue

2023-12-19 10:06:53 +01:00

Blender Bot added

and removed

labels 2023-12-19 10:06:59 +01:00

Adam Preisler referenced this issue

2023-12-19 16:58:22 +01:00

Smart UV project sometimes doesn't align the islands properly #116355

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