Smart UV Project invert the resulting UVs #83084

New Issue

Oliver Villar · 2020-11-27T01:51:26+01:00

Oliver Villar commented

2020-11-27 01:51:26 +01:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce RTX 2080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 457.30

Blender Version
Broken: version: 2.91.0, branch: master, commit date: 2020-11-25 08:34, hash: 0f45cab862
Worked: 2.90.1

Caused by 850234c1b1

Short description of error
When using Smart UV Project, the resulting UVs are inverted in the X axis, compared to resulting UVs from Unwrap.

Exact steps for others to reproduce the error

Create a plane.
Use Smart UV Project.
If a material with a texture is added to the plane, the image will be inverted.

This doesn't happen using Unwrap.

Thanks!

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: GeForce RTX 2080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 457.30 **Blender Version** Broken: version: 2.91.0, branch: master, commit date: 2020-11-25 08:34, hash: `0f45cab862` Worked: 2.90.1 Caused by 850234c1b1 **Short description of error** When using Smart UV Project, the resulting UVs are inverted in the X axis, compared to resulting UVs from Unwrap. **Exact steps for others to reproduce the error** 1. Create a plane. 2. Use Smart UV Project. 3. If a material with a texture is added to the plane, the image will be inverted. This doesn't happen using Unwrap. Thanks!

Oliver Villar commented

2020-11-27 01:51:26 +01:00

Added subscriber: @OliverVillar

blender-admin commented

2020-11-27 01:51:26 +01:00

#84573 was marked as duplicate of this issue

Marc Miralles commented

2020-11-27 01:56:20 +01:00

Added subscriber: @MarcFree3D

Marc Miralles commented

2020-11-27 01:56:20 +01:00

I have exactly the same problem. If use Smart UV project the texture image is inverted. But if I use Unwrap it works fine.

Philipp Oeser commented

2020-11-27 10:48:39 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2020-11-27 10:48:39 +01:00

Not sure if there is really a "right" or "wrong" here?

If you compare Unwrap to Smart UV to the generated default UVs then they all have a different orientation.

Not sure if there is really a "right" or "wrong" here? If you compare `Unwrap` to `Smart UV` to the `generated default` UVs then they **all** have a different orientation.

Oliver Villar commented

2020-11-27 19:24:02 +01:00

I would understand a difference in orientation, but this is not the problem. They show inverted, as in -1 scale in the X axis. A simple texture won't seem problematic, but if the texture includes a text, the text will be "reflected". The resulting UVs have to be scaled in X -1 to be fixed.

Marc Miralles commented

2020-11-29 06:09:57 +01:00

And the question is: if I Scale in X-1 when this are fixed all of the textures stay inverted?

The inversion may be not clear in a normal texture, but if the texture contains text it's very clear .

this is inverted using smart uv project. Similar to look a book in front of mirror

and if you use simply unwrap this is the result, works fine, and text isn't inverted

I think this two images can shed light to the question

And the question is: if I Scale in X-1 when this are fixed all of the textures stay inverted? The inversion may be not clear in a normal texture, but if the texture contains text it's very clear . ![image.png](https://archive.blender.org/developer/F9405033/image.png) *this is inverted using smart uv project. Similar to look a book in front of mirror* ![image.png](https://archive.blender.org/developer/F9405044/image.png) *and if you use simply unwrap this is the result, works fine, and text isn't inverted* I think this two images can shed light to the question

Richard Antalik commented

2020-12-07 18:06:25 +01:00

Added subscriber: @iss