Transfer UV Maps fails #48900

Closed
opened 2016-07-19 22:40:40 +02:00 by Thomas Holenstein · 6 comments

System Information
Windows 10, AMD Radeon HD 7700 Series

Blender Version
Broken: Blender 2.77a
Worked: (optional)

Short description of error
When Transfering the UV Map from one object to another (Using CTRL-L, Transfer UV Map), the result is sometimes wrong.

Exact steps for others to reproduce the error

  1. Open a new blender file, delete the default cube, add a new grid mesh with X=3 and Y=3 subdivisions.
  2. Add a solidify modifier, thickness 1, remove "Fill Rim". Apply the modifier.
  3. Edit Mode, select top part, separate with "P, Selection".
  4. Edit Mode, select top part, create UV map with "U Unwrap".
  5. Object mode, select bottom part, then shift select top part, "Ctrl-L Transfer UV Maps".
  6. Create a Material and load a non-trivial texture, then map both the top and bottom to this material.
  7. Switch Rendering to Material.
  8. Result: Objects look different. Expected: Objects look the same.

I attached a blender file with the result for me; plus a screenshot of the result.

UVMapTransferBug.blend

TestTexture.png

**System Information** Windows 10, AMD Radeon HD 7700 Series **Blender Version** Broken: Blender 2.77a Worked: (optional) **Short description of error** When Transfering the UV Map from one object to another (Using CTRL-L, Transfer UV Map), the result is sometimes wrong. **Exact steps for others to reproduce the error** 1) Open a new blender file, delete the default cube, add a new grid mesh with X=3 and Y=3 subdivisions. 2) Add a solidify modifier, thickness 1, remove "Fill Rim". Apply the modifier. 3) Edit Mode, select top part, separate with "P, Selection". 4) Edit Mode, select top part, create UV map with "U Unwrap". 5) Object mode, select bottom part, then shift select top part, "Ctrl-L Transfer UV Maps". 6) Create a Material and load a non-trivial texture, then map both the top and bottom to this material. 7) Switch Rendering to Material. 8) Result: Objects look different. Expected: Objects look the same. I attached a blender file with the result for me; plus a screenshot of the result. [UVMapTransferBug.blend](https://archive.blender.org/developer/F325155/UVMapTransferBug.blend) ![TestTexture.png](https://archive.blender.org/developer/F325154/TestTexture.png)

Changed status to: 'Open'

Changed status to: 'Open'

Added subscriber: @tholenst

Added subscriber: @tholenst

Screenshot is here.

Screenshot.png

Screenshot is here. ![Screenshot.png](https://archive.blender.org/developer/F325157/Screenshot.png)

Added subscriber: @mont29

Added subscriber: @mont29

Changed status from 'Open' to: 'Archived'

Changed status from 'Open' to: 'Archived'
Bastien Montagne self-assigned this 2016-07-21 17:56:28 +02:00

Thanks for the report, but 'transfer UV map' only makes a 'dummy' one-to-one copy of UVmaps (i.e. expects exact matching geometry, including mesh items ordering).
You should use new 'data transfer' (ctrl-shift-T) with project options here I think… No bug here anyway, tool behave as expected.

Thanks for the report, but 'transfer UV map' only makes a 'dummy' one-to-one copy of UVmaps (i.e. expects exact matching geometry, including mesh items ordering). You should use new 'data transfer' (`ctrl-shift-T`) with project options here I think… No bug here anyway, tool behave as expected.
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Reference: blender/blender#48900
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