Transfer UV Maps (and all over kinds of UV copying) has wrong results on some objects (UV Sphere) #52516

New Issue

Vik · 2017-08-23T22:00:19+02:00

Vik commented

2017-08-23 22:00:19 +02:00

System Information
Mint 17.3 (x86_64)/Windows7 x64 | 8GB ram| PhenomII 1090T| Radeon R9 270 (fglrx 15.201.1151)

Blender Version
Broken: (2.69 << O_o!!! >> 2.79.1 e476298)
Worked: (???)

Short description of error

Copying UV's on objects called by irony of doom 'UV Sphere' has strange mystery results, not only with 'transfer uv maps' but with over ways of uv copying such as 'magic-uv copy' too. Monkeyhead has no this trouble.

Exact steps for others to reproduce the error
uv_transfer_bug.blend

Take a one standard UV Sphere with adequate UV
Take a one standard UV Sphere without UV
Select them such way as first be active and second was selected too
Cast Ctrl+L>Transfer UV Maps
Watch the difference between UVs in image editor

**System Information** Mint 17.3 (x86_64)/Windows7 x64 | 8GB ram| PhenomII 1090T| Radeon R9 270 (fglrx 15.201.1151) **Blender Version** Broken: (2.69 << O_o!!! >> 2.79.1 e476298) Worked: (???) **Short description of error** ![transUV_bug.png](https://archive.blender.org/developer/F722939/transUV_bug.png) Copying UV's on objects called by irony of doom 'UV Sphere' has strange mystery results, not only with 'transfer uv maps' but with over ways of uv copying such as 'magic-uv copy' too. Monkeyhead has no this trouble. **Exact steps for others to reproduce the error** [uv_transfer_bug.blend](https://archive.blender.org/developer/F722963/uv_transfer_bug.blend) 1. Take a one standard UV Sphere with adequate UV 2. Take a one standard UV Sphere without UV 3. Select them such way as first be active and second was selected too 4. Cast Ctrl+L>Transfer UV Maps 5. Watch the difference between UVs in image editor

Vik commented

2017-08-23 22:00:19 +02:00

Changed status to: 'Open'

Vik commented

2017-08-23 22:00:19 +02:00

Added subscriber: @V-11

blender-admin commented

2017-08-23 22:00:19 +02:00

#84122 was marked as duplicate of this issue

ronan ducluzeau commented

2017-08-24 13:30:06 +02:00

Added subscriber: @zeauro

ronan ducluzeau commented

2017-08-24 13:30:06 +02:00

Explanations are probably not enough detailed about this kind of transfer in manual.
Having same geometry is not a sufficient condition to expect a successful transfer.

You need faces with matching indices, too.

You have to enter edit mode of meshes and sort mesh elements with same method.
In provided.blend, you enter edit mode of one sphere and use Sort Mesh Elements operator to order faces according View Z Axis.
Then redo same thing for the other sphere.
And now, that faces indices are matching, you can expect a successful transfer of UVmap.

Explanations are probably not enough detailed about this kind of transfer in manual. Having same geometry is not a sufficient condition to expect a successful transfer. You need faces with matching indices, too. You have to enter edit mode of meshes and sort mesh elements with same method. In provided.blend, you enter edit mode of one sphere and use Sort Mesh Elements operator to order faces according View Z Axis. Then redo same thing for the other sphere. And now, that faces indices are matching, you can expect a successful transfer of UVmap.

Bastien Montagne commented

2017-08-26 12:34:19 +02:00

Added subscriber: @mont29