Merge Limit of mirror modifier does not act definitely. #44630

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perfection cat · 2015-05-07T10:29:40+02:00

perfection cat commented

2015-05-07 10:29:40 +02:00

System Information
windows XP/SP3 32bits

Blender Version
Broken: version 2.74 (sub 5), branch b'master', commit date b'2015-05-07' b'00:12', hash b'165598e', b'Release'
Worked: unknown

Short description of error
Merge Limit of mirror modifier does not act definitely.
Exact steps for others to reproduce the error
I think that Merge Limit of mirror modifier does not work definitely.
2.74 .blend
untitled.blend
2.49b .blend
(I saved it after I returned the setting of the language to English.)
249buntitled.blend

Operation image of 2.49b
I reverse modifier stack.
[Merge Limit = 0.0]
[Merge Limit = 0.2]
[Merge Limit = 0.6]
[Merge Limit = 0.9]
[Merge Limit = 1.0]

Some transformation is not carried out in the revised version.

Operation image of revised version.
{F171084}
UV does not seem to be right. I see it in the same way in 2.49b.{F171088}

**System Information** windows XP/SP3 32bits **Blender Version** Broken: version 2.74 (sub 5), branch b'master', commit date b'2015-05-07' b'00:12', hash b'165598e', b'Release' Worked: unknown **Short description of error** Merge Limit of mirror modifier does not act definitely. **Exact steps for others to reproduce the error** I think that Merge Limit of mirror modifier does not work definitely. 2.74 .blend [untitled.blend](https://archive.blender.org/developer/F171071/untitled.blend) 2.49b .blend (I saved it after I returned the setting of the language to English.) [249buntitled.blend](https://archive.blender.org/developer/F171073/249buntitled.blend) Operation image of 2.49b I reverse modifier stack. [Merge Limit = 0.0]![249b001.jpg](https://archive.blender.org/developer/F171074/249b001.jpg) [Merge Limit = 0.2]![249b002.jpg](https://archive.blender.org/developer/F171076/249b002.jpg) [Merge Limit = 0.6]![249b003.jpg](https://archive.blender.org/developer/F171078/249b003.jpg) [Merge Limit = 0.9]![249b004.jpg](https://archive.blender.org/developer/F171080/249b004.jpg) [Merge Limit = 1.0]![249b005.jpg](https://archive.blender.org/developer/F171082/249b005.jpg) Some transformation is not carried out in the revised version. Operation image of revised version. {[F171084](https://archive.blender.org/developer/F171084/Untitled.png)}![untitled2.png](https://archive.blender.org/developer/F171086/untitled2.png) UV does not seem to be right. I see it in the same way in 2.49b.{[F171088](https://archive.blender.org/developer/F171088/untitled3.png)}![untitled4.png](https://archive.blender.org/developer/F171090/untitled4.png)

perfection cat commented

2015-05-07 10:29:40 +02:00

Changed status to: 'Open'

perfection cat commented

2015-05-07 10:29:40 +02:00

Added subscriber: @sindra1961

Brecht Van Lommel commented

2015-05-07 10:47:57 +02:00

Changed status from 'Open' to: 'Archived'

Brecht Van Lommel closed this issue

2015-05-07 10:47:57 +02:00

Brecht Van Lommel self-assigned this 2015-05-07 10:47:57 +02:00

Brecht Van Lommel commented

2015-05-07 10:47:58 +02:00

The difference between 2.49 and 2.74 is how the merge limit is interpreted, in 2.49 it is the distance from the axis, in 2.74 it is the distance between the vertices. If you scale the mesh to half the size in 2.74 you get the same effect as in 2.49. It doesn't seem worth breaking compatibility to make 2.74 consistent with 2.49.

The UVs look correct to me. Yes they are distorted, but that's what you get when merging them. The only way to not distort them is to keep the UV islands separate or to modify UVs further in the mesh, which is not something that we should be doing because it would lead to unexpected side effects. The purpose of this mirror limit is to merge vertices that are already really close together, and in that case there will be no visible distortion.

The difference between 2.49 and 2.74 is how the merge limit is interpreted, in 2.49 it is the distance from the axis, in 2.74 it is the distance between the vertices. If you scale the mesh to half the size in 2.74 you get the same effect as in 2.49. It doesn't seem worth breaking compatibility to make 2.74 consistent with 2.49. The UVs look correct to me. Yes they are distorted, but that's what you get when merging them. The only way to not distort them is to keep the UV islands separate or to modify UVs further in the mesh, which is not something that we should be doing because it would lead to unexpected side effects. The purpose of this mirror limit is to merge vertices that are already really close together, and in that case there will be no visible distortion.

blender-admin commented

2015-05-07 10:57:37 +02:00

This issue was referenced by 0e9b210595

This issue was referenced by 0e9b210595e3a1f07e079b9f3e5e3abb9a2039a9

Brecht Van Lommel commented

2015-05-07 10:58:29 +02:00

Changed status from 'Archived' to: 'Resolved'

Brecht Van Lommel commented

2015-05-07 10:58:29 +02:00

Closed by commit 0e9b210595.

Closed by commit 0e9b210595.

Brecht Van Lommel commented

2015-05-07 10:58:37 +02:00

The merge limit tooltip was wrong though, so I fixed that.

perfection cat commented

2015-05-08 03:56:17 +02:00

Added subscribers: @Psy-Fi, @brecht

perfection cat commented

2015-05-08 03:56:17 +02:00

I was able to understand the meaning that @Psy-Fi said.
Because I did not translate his last comment, I did not seem to understand it.

@brecht:
Thank you for revising tooltips.

I was able to understand the meaning that @Psy-Fi said. Because I did not translate his last comment, I did not seem to understand it. @brecht: Thank you for revising tooltips.

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Merge Limit of mirror modifier does not act definitely. #44630