UV Unwrap Seems to be working oddly or Broken #68744

New Issue

Panundrum · 2019-08-16T19:14:18+02:00

Panundrum commented

2019-08-16 19:14:18 +02:00

I am an artist that is trying out blender, I am a 3Dstudio max user that has used 3D studio max for about 15 years.
I seemed to have run into an issue that completely breaks using the program from unwrapping or using it to edit my UV's

(Using Blender 2.8)

Examples

Example Number 1:

Open a new scene, Either add a cube or use the cube in the scene.
Click the UV Editing tab
Click edit mode on the right window
Select everything
On the left click select faces
Click the move tool and move one of the faces. (The face should move stretching the nearby polygons, this is expected behaviour when uv modeling)
Click the UV Sync Selection button on the top Left (We need to select this because otherwise the whole UV vanishes from the viewport if it is not selected making it impossible to edit the UVs as a whole)
Click select faces on the left and then click a face, then move it.
(This will RIP the polygon out of the UV, which should not happen unless you have selected to break rip or detach the face first from the UV.)

This makes it impossible to UV edit with this behavior. Unless there is some option I am missing to prevent this. It has my fellow artists confused as well that are trying to come from other modeling programs.

Thank you!

System Information
Operating system: Windows-10-10.0.17134 64 Bits
Graphics card: Radeon RX 570 Series ATI Technologies Inc. 4.5.13558 Core Profile Context 26.20.11015.5009

Blender Version
Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: f6cb5f5449
Worked: (optional)

Short description of error
[Please fill out a short description of the error here]

Exact steps for others to reproduce the error
[Please describe the exact steps needed to reproduce the issue]
[Based on the default startup or an attached .blend file (as simple as possible)]

I am an artist that is trying out blender, I am a 3Dstudio max user that has used 3D studio max for about 15 years. I seemed to have run into an issue that completely breaks using the program from unwrapping or using it to edit my UV's (Using Blender 2.8) Examples Example Number 1: - Open a new scene, Either add a cube or use the cube in the scene. - Click the UV Editing tab - Click edit mode on the right window - Select everything - On the left click select faces - Click the move tool and move one of the faces. (The face should move stretching the nearby polygons, this is expected behaviour when uv modeling) - Click the UV Sync Selection button on the top Left (We need to select this because otherwise the whole UV vanishes from the viewport if it is not selected making it impossible to edit the UVs as a whole) - Click select faces on the left and then click a face, then move it. (This will RIP the polygon out of the UV, which should not happen unless you have selected to break rip or detach the face first from the UV.) This makes it impossible to UV edit with this behavior. Unless there is some option I am missing to prevent this. It has my fellow artists confused as well that are trying to come from other modeling programs. Thank you! **System Information** Operating system: Windows-10-10.0.17134 64 Bits Graphics card: Radeon RX 570 Series ATI Technologies Inc. 4.5.13558 Core Profile Context 26.20.11015.5009 **Blender Version** Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: `f6cb5f5449` Worked: (optional) **Short description of error** [Please fill out a short description of the error here] **Exact steps for others to reproduce the error** [Please describe the exact steps needed to reproduce the issue] [Based on the default startup or an attached .blend file (as simple as possible)]

Panundrum commented

2019-08-16 19:14:18 +02:00

Added subscriber: @Panundrum

Evan Wilson commented

2019-08-17 05:17:08 +02:00

Added subscriber: @EAW

Evan Wilson commented

2019-08-17 05:17:08 +02:00

I must say upfront that UV editing is not something I know a lot about.

The fix (or one that I at least know of) to your issue (if I understand it correctly) is turning on proportional editing. It is in the center of the left window at the top. It is highlighted in yellow in this screenshot.

When it is on, the polygons remain intact when only one face is selected and moved.

I must say upfront that UV editing is not something I know a lot about. The fix (or one that I at least know of) to your issue (if I understand it correctly) is turning on proportional editing. It is in the center of the left window at the top. It is highlighted in yellow in this screenshot. ![proportional edit.jpg](https://archive.blender.org/developer/F7668541/proportional_edit.jpg) When it is on, the polygons remain intact when only one face is selected and moved. ![proportional editing movement.jpg](https://archive.blender.org/developer/F7668543/proportional_editing_movement.jpg)

Panundrum commented

2019-08-18 23:13:43 +02:00

This comment was removed by @Panundrum

*This comment was removed by @Panundrum*

Panundrum commented

2019-08-18 23:19:06 +02:00

In #68744#754825, @EAW wrote:
I must say upfront that UV editing is not something I know a lot about.

The fix (or one that I at least know of) to your issue (if I understand it correctly) is turning on proportional editing. It is in the center of the left window at the top. It is highlighted in yellow in this screenshot.

When it is on, the polygons remain intact when only one face is selected and moved.

This acts as expected if you turn the proportional Editing mode on and turn the circle of influence all the way down with the mouse button.
This is incredibly odd (Broken)behavior, this should be default as you should never ever be able to move polygons as if they were not welded be their vertices.

> In #68744#754825, @EAW wrote: > I must say upfront that UV editing is not something I know a lot about. > > The fix (or one that I at least know of) to your issue (if I understand it correctly) is turning on proportional editing. It is in the center of the left window at the top. It is highlighted in yellow in this screenshot. ![proportional edit.jpg](https://archive.blender.org/developer/F7668541/proportional_edit.jpg) > > When it is on, the polygons remain intact when only one face is selected and moved. ![proportional editing movement.jpg](https://archive.blender.org/developer/F7668543/proportional_editing_movement.jpg) This acts as expected if you turn the proportional Editing mode on and turn the circle of influence all the way down with the mouse button. This is incredibly odd (Broken)behavior, this should be default as you should never ever be able to move polygons as if they were not welded be their vertices.

Jacques Lucke commented

2019-08-20 17:14:51 +02:00

Added subscribers: @JulienKaspar, @JacquesLucke

Jacques Lucke commented

2019-08-20 17:14:51 +02:00

This worked the same in Blender 2.79. It seems wrong to me as well, but I'm not really a user of the uv editor.

@JulienKaspar is it intended behavior that faces are ripped out when one is in face-select mode and selection-sync is enabled?

This worked the same in Blender 2.79. It seems wrong to me as well, but I'm not really a user of the uv editor. @JulienKaspar is it intended behavior that faces are ripped out when one is in face-select mode and selection-sync is enabled?

Panundrum commented

2019-08-20 18:36:04 +02:00

Normally you need to break polygons/Verts in all other programs before they can be moved independently. This is very very confusing. Also the fact that moving verts causes it to move other verts not selected but are broken off.

Julien Kaspar commented

2019-08-20 19:23:28 +02:00

@JacquesLucke Yeah this is intentional as far as I know. I don't like it as well.
The selection modes have some weird conditions on shared UV point positions. This coupled with the very different behaviour of the selection syncing makes it quite confusing to work with. It takes a while to internalise how everything works. IMO this needs a redesign at some point.

@JacquesLucke Yeah this is intentional as far as I know. I don't like it as well. The selection modes have some weird conditions on shared UV point positions. This coupled with the very different behaviour of the selection syncing makes it quite confusing to work with. It takes a while to internalise how everything works. IMO this needs a redesign at some point.

Jacques Lucke commented

2019-08-20 19:54:38 +02:00

The question is if this is really intentional or just an artifact of the current implementation.
In the latter case it could be considered a bug, otherwise we should close this and hope that there will be a larger redesign at some point.

The question is if this is really intentional or just an artifact of the current implementation. In the latter case it could be considered a bug, otherwise we should close this and hope that there will be a larger redesign at some point.

Brecht Van Lommel commented

2019-10-03 02:46:14 +02:00

Added subscriber: @brecht

Brecht Van Lommel commented

2019-10-03 02:46:14 +02:00

Changed status from 'Open' to: 'Archived'

Brecht Van Lommel closed this issue

2019-10-03 02:46:14 +02:00

Brecht Van Lommel self-assigned this 2019-10-03 02:46:14 +02:00

Brecht Van Lommel commented

2019-10-03 02:46:14 +02:00

This is not a bug, but something that can be redesigned once.

If sync selection is enabled, it purely uses 3D viewport selection, which has no concept of individual UV vertex selection.

This is not a bug, but something that can be redesigned once. If sync selection is enabled, it purely uses 3D viewport selection, which has no concept of individual UV vertex selection.

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UV Unwrap Seems to be working oddly or Broken #68744