UVs not unwrapping to 0-1 space in blender 2.8 when unselected in the Image Editor #57640

New Issue

Vyacheslav · 2018-11-05T20:27:13+01:00

Vyacheslav commented

2018-11-05 20:27:13 +01:00

i see 2 error in uv.
1 if i select 1 face, this face big size in uv editor.
2 if i select all face and pressed unwrap uv , this no created uv.

i see 2 error in uv. 1 if i select 1 face, this face big size in uv editor. 2 if i select all face and pressed unwrap uv , this no created uv. ![1.png](https://archive.blender.org/developer/F5392832/1.png) ![2.png](https://archive.blender.org/developer/F5392830/2.png)

Vyacheslav commented

2018-11-05 20:27:13 +01:00

Added subscriber: @Ghostil

blender-admin commented

2018-11-05 20:27:13 +01:00

#58043 was marked as duplicate of this issue

blender-admin commented

2018-11-05 20:27:13 +01:00

#57906 was marked as duplicate of this issue

Philipp Oeser commented

2018-11-06 11:30:12 +01:00

Added subscribers: @ideasman42, @lichtwerk

Campbell Barton was assigned by Philipp Oeser

2018-11-06 11:30:12 +01:00

Philipp Oeser commented

2018-11-06 11:30:12 +01:00

To me it seems blender2.8 behaves a little differently from 2.79 in regards to selection:

All is fine if you have the Keep UV and edit mode mesh selection in syncoption ON.
If you have this ON you should have a UVs unwrapped and in 0-1 UV space.
(this was kind of reported before in #57060 -- and eventually closed but issue with selection persist actually, see the following)

Now to the difference (see attached file):
#57640.blend
In 2.8, it makes a difference which UVs you have selected in the UVEditor, in 2.79 this was not the case.
If you have a single UV selected (in UV editor), but select all faces in the 3D view and call unwrap from the 3D view then

2.79 will unwrap all and put them in 0-1 space
2.8 will unwrap all (but seperated in two islands), but only pack one part in 0-1 space the other is somewhere out of 0-1 space

I think this should not be intentional?
@ideasman42 : mind having a look?

To me it seems blender2.8 behaves a little differently from 2.79 in regards to selection: All is fine if you have the `Keep UV and edit mode mesh selection in sync`option ON. If you have this ON you should have a UVs unwrapped and in 0-1 UV space. (this was kind of reported before in #57060 -- and eventually closed but issue with selection persist actually, see the following) Now to the difference (see attached file): [#57640.blend](https://archive.blender.org/developer/F5406600/T57640.blend) In 2.8, it makes a difference which UVs you have selected in the UVEditor, in 2.79 this was not the case. If you have a single UV selected (in UV editor), but select all faces in the 3D view and call unwrap from the 3D view then - 2.79 will unwrap all and put them in 0-1 space - 2.8 will unwrap all (but seperated in two islands), but only pack one part in 0-1 space the other is somewhere out of 0-1 space I think this should not be intentional? @ideasman42 : mind having a look?

Vyacheslav commented

2018-11-06 21:57:26 +01:00

In #57640#550319, @lichtwerk wrote:
To me it seems blender2.8 behaves a little differently from 2.79 in regards to selection:

All is fine if you have the Keep UV and edit mode mesh selection in syncoption ON.
If you have this ON you should have a UVs unwrapped and in 0-1 UV space.
(this was kind of reported before in #57060 -- and eventually closed but issue with selection persist actually, see the following)

Now to the difference (see attached file):
#57640.blend
In 2.8, it makes a difference which UVs you have selected in the UVEditor, in 2.79 this was not the case.
If you have a single UV selected (in UV editor), but select all faces in the 3D view and call unwrap from the 3D view then

2.79 will unwrap all and put them in 0-1 space

2.8 will unwrap all (but seperated in two islands), but only pack one part in 0-1 space the other is somewhere out of 0-1 space

I think this should not be intentional?
@ideasman42 : mind having a look?

Thank you very much for the explanation. This button is much better.
It is not enough now to copy, paste to work with uv.

> In #57640#550319, @lichtwerk wrote: > To me it seems blender2.8 behaves a little differently from 2.79 in regards to selection: > > All is fine if you have the `Keep UV and edit mode mesh selection in sync`option ON. > If you have this ON you should have a UVs unwrapped and in 0-1 UV space. > (this was kind of reported before in #57060 -- and eventually closed but issue with selection persist actually, see the following) > > Now to the difference (see attached file): > [#57640.blend](https://archive.blender.org/developer/F5406600/T57640.blend) > In 2.8, it makes a difference which UVs you have selected in the UVEditor, in 2.79 this was not the case. > If you have a single UV selected (in UV editor), but select all faces in the 3D view and call unwrap from the 3D view then > - 2.79 will unwrap all and put them in 0-1 space > - 2.8 will unwrap all (but seperated in two islands), but only pack one part in 0-1 space the other is somewhere out of 0-1 space > > I think this should not be intentional? > @ideasman42 : mind having a look? Thank you very much for the explanation. This button is much better. It is not enough now to copy, paste to work with uv.

Brecht Van Lommel commented

2018-11-18 12:35:59 +01:00

Added subscriber: @Kent-Davis

Philipp Oeser commented

2018-11-25 18:45:30 +01:00

Added subscriber: @Povert

Philipp Oeser changed title from ~~Error in UV editor in blender 2.8~~ to UVs not unwrapping to 0-1 space in blender 2.8 when unselected in the Image Editor

2018-11-25 18:47:31 +01:00

Roger B commented

2018-12-05 06:28:43 +01:00

Added subscriber: @rboxman

Roger B commented

2018-12-05 06:28:43 +01:00

This can be easily observed with the default cube.

Sync-off, simple 'U' unwrap with all edges as seams:

Sync-on, simple 'U' unwrap with all edges as seams:

This can be easily observed with the default cube. Sync-off, simple 'U' unwrap with all edges as seams: ![uv-bad.jpg](https://archive.blender.org/developer/F5828985/uv-bad.jpg) Sync-on, simple 'U' unwrap with all edges as seams: ![uv-ok.jpg](https://archive.blender.org/developer/F5828988/uv-ok.jpg)

blender-admin commented

2018-12-07 13:52:14 +01:00

This issue was referenced by 012a44cff1

This issue was referenced by 012a44cff11ffb12a65409ba68b4e66caded28a7

Brecht Van Lommel commented

2018-12-07 13:55:42 +01:00

Changed status from 'Open' to: 'Resolved'

Brecht Van Lommel closed this issue

2018-12-07 13:55:42 +01:00

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UVs not unwrapping to 0-1 space in blender 2.8 when unselected in the Image Editor #57640